Mathmetics
ISBT Mathmetics for all banking PO,Clerk,IBPS PO,Railway,SSC,IAS,OAS Exams
Q501. |
Directions : Study the information carefully to answer the questions that follow : There are two companies A and B. Both companies produce all the four different products viz., Computers, Phones, Pen dirves and Compact Discs (CDs). Company A produces a total of 800 products. The respective ratio between the total products produced by Company A and Company B is 4 : 5. 20% of the total products by company B are Pen drives and 40% of them are CDs. Two-fifth of the remaining products produced by company B are Phones. The total number of computers produced by both the companies together is 340. 20% of the total products produced by company A are CDs. Company A produces equal number of Pen drives and Phones. What is the difference between the number of CDs produced by Company B and the number of computers produced by Company A ? |
| 1) | 205 | 2) | 240 |
| 3) | 300 | 4) | 320 |
| 5) | None of these | ||
Answer : 300
View AnswerQ502. |
Directions : Study the information carefully to answer the questions that follow : There are two companies A and B. Both companies produce all the four different products viz., Computers, Phones, Pen dirves and Compact Discs (CDs). Company A produces a total of 800 products. The respective ratio between the total products produced by Company A and Company B is 4 : 5. 20% of the total products by company B are Pen drives and 40% of them are CDs. Two-fifth of the remaining products produced by company B are Phones. The total number of computers produced by both the companies together is 340. 20% of the total products produced by company A are CDs. Company A produces equal number of Pen drives and Phones. What is the difference between the number of CDs produced by Company B and the number of computers produced by Company A ? |
| 1) | 205 | 2) | 240 |
| 3) | 300 | 4) | 320 |
| 5) | None of these | ||
Answer : 300
View AnswerQ503. |
Directions : Study the information carefully to answer the questions that follow : There are two companies A and B. Both companies produce all the four different products viz., Computers, Phones, Pen dirves and Compact Discs (CDs). Company A produces a total of 800 products. The respective ratio between the total products produced by Company A and Company B is 4 : 5. 20% of the total products by company B are Pen drives and 40% of them are CDs. Two-fifth of the remaining products produced by company B are Phones. The total number of computers produced by both the companies together is 340. 20% of the total products produced by company A are CDs. Company A produces equal number of Pen drives and Phones. What is the average of the number of Pen drives, CDs and Computers produced by company B ? |
| 1) | 240 | 2) | 280 |
| 3) | 480 | 4) | 840 |
| 5) | None of these | ||
Answer : 280
View AnswerQ504. |
|
| 1) | 24% | 2) | 27% |
| 3) | 29% | 4) | 3% |
| 5) | None of these | ||
Answer : 27%
View AnswerQ505. |
Directions : Study the information carefully to answer the questions that follow : There are two companies A and B. Both companies produce all the four different products viz., Computers, Phones, Pen dirves and Compact Discs (CDs). Company A produces a total of 800 products. The respective ratio between the total products produced by Company A and Company B is 4 : 5. 20% of the total products by company B are Pen drives and 40% of them are CDs. Two-fifth of the remaining products produced by company B are Phones. The total number of computers produced by both the companies together is 340. 20% of the total products produced by company A are CDs. Company A produces equal number of Pen drives and Phones. What is the total number of phones produced by both the companies together ? |
| 1) | 380 | 2) | 420 |
| 3) | 430 | 4) | 520 |
| 5) | None of these | ||
Answer : 430
View AnswerQ506. |
|
| 1) | 8 : 9 | 2) | 9 : 7 |
| 3) | 7 : 9 | 4) | 4 : 9 |
| 5) | None of these | ||
Answer : 8 : 9
View AnswerQ507. |
|
| 1) | 428 km | 2) | 502 km |
| 3) | 552 km | 4) | 586 km |
| 5) | None of these | ||
Answer : 552 km
Explanation :
Explanation :
Given that distance travelled in 1st hour = 35 km
and speed of the bus increases by 2 km after every one hour
Hence distance travelled in 2nd hour = 37 km
Hence distance travelled in 3rd hour = 39 km
Total Distance Travelled = [35 + 37 + 39 + ... (12 terms)]
This is an Arithmetic Progression(AP) with
first term, a=35, number of terms,n = 12 and common difference, d=2.
The sequence a , (a + d), (a + 2d), (a + 3d), (a + 4d), . . . is called an Arithmetic Progression(AP)
where a is the first term and d is the common difference of the AP
Sum of the first n terms of an Arithmetic Progression(AP),Sn=n/2[2a+(n−1)d]
where n = number of terms
Hence, [35+37+39+... (12 terms)]=S12=12/2[2×35+(12−1)2]=6[70+22]=6×92=552
Hence the total distance travelled = 552 km
View AnswerQ508. |
|
| 1) | 1 hr | 2) | 1 hr 12 min |
| 3) | 1 hr 36 min | 4) | 2 hrs |
| 5) | None of these | ||
Answer : 1 hr 12 min
Explanation :
Explanation :
Let distace = 1 km , seed= 1 kmph So, time taken = 1/1= 1hr
New speed = 6/7 of usual speed
Speed and time are inversely proportional.
Hence new time = 7/6 of usual time
Hence, 7/6 of usual time - usual time = 12 minutes
=> 1/6 of usual time = 12 minutes
=> usual time = 12 x 6 = 72 minutes = 1 hour 12 minutes
View AnswerQ509. |
|
| 1) | 32 | 2) | 36 |
| 3) | 40 | 4) | 48 |
| 5) | None of these | ||
Answer : 40
View AnswerQ510. |
|
| 1) | 120 km | 2) | 180 km |
| 3) | 205 km | 4) | 224 km |
| 5) | None of these | ||
Answer : 224 km
Explanation :
Explanation :
we know that , Distance = speed x time
Let time taken to travel the first half = x hr
then time taken to travel the second half = (10 - x) hr
Distance covered in the the first half = 21x
Distance covered in the the second half = 24(10 - x)
But distance covered in the the first half = Distance covered in the the second half
=> 21x = 24(10 - x) => 21x = 240 - 24x => 45x = 240 ⇒x=16/3
Hence Distance covered in the the first half = 21x=21×16/3 = 7×16=112 km
Total distance = 2×112 = 224 km
View Answer