Three professors Dr. Gupta, Dr. Sharma, Dr. Singh are evaluating answer script of a subject. Dr. Gupta is 40% more efficient than Dr. Sharma, who is 20% more efficient than Dr. Singh. Dr. Gupta takes 10 days less than Dr. Sharma to complete the evaluation work. Dr. Gupta starts the evaluation work and works for 10 days and then Dr. Sharma takes over. Dr. Sharma evaluates for next 15 days and then stops. In how many days, Dr. Singh can complete the remaining evaluation work

1.  7.2 days

2.  9.5 days

3.  11.5 days

4.  None of these

View Answer  
4
Correct Answer :

7.2 days


Explanation :
No Explanation available for this question

X alone can do a piece of work in 15 days and Y alone can do it in 10 days. X and Y undertook to do it for Rs. 720. With the help of Z they finished it in 5 days. How much is paid to Z

1.  Rs. 360

2.  Rs. 120

3.  Rs. 240

4.  Rs. 300

View Answer  
4
Correct Answer :

Rs. 120


Explanation :
No Explanation available for this question

A work is done by 30 workers not all of them have the same capacity to work. Every day exactly 2 workers, do the work with no pair of workers working together twice. Even after all possible pairs have worked once, all the workers together works for two more days to finish the work. Find the number of days in which all the workers together will finish the whole work

1.  31

2.  29

3.  41

4.  48

View Answer  
4
Correct Answer :

31


Explanation :
No Explanation available for this question

A factory produces nuts and bolts. A machine in it produces only nuts while another produces only bolts. The machine producing only nuts produces 400 nuts per minute and need to be cleared for 15 minutes after production of 2000 nuts. The machine producing only bolts produces 300 bolts per minute and needs to be cleared for 15 minutes after production of 3000 bolts. Find the minimum time required to produce 12000 pairs of bolts and nuts if both machines are operated simultaneously.

1.  85 minutes

2.  105 minutes

3.  100 minutes

4.  115 minutes

View Answer  
4
Correct Answer :

105 minutes


Explanation :
No Explanation available for this question

Ramesh has two examinations on Wednesday - Engineering mathematics in the morning and Engineering Drawing in the afternoon. He has a fixed amount of time to read the textbooks of both these subjects on Tuesday. During this time he can read 80 pages of Engineering Mathematics and 100 pages of Engineering drawing. Alternatively, he can also read 50 pages of Engineering Mathematics and 250 pages of Engineering drawing. Assume that the amount of time it takes to read one page of the textbook of either subject is constant. Ramesh is confident about Engineering Drawing and wants to devote full time to reading Engineering Mathematics. The number of Engineering Mathematics text book pages he can read on Tuesday is :

1.  500

2.  300

3.  100

4.  60

View Answer  
4
Correct Answer :

100


Explanation :
No Explanation available for this question

If x = (163 + 173 + 183 + 193), then x divided by 70 leaves a remainder of

1.  0

2.  1

3.  69

4.  35

View Answer  
4
Correct Answer :

0


Explanation :
No Explanation available for this question

A chemical plant has four tanks (A, B, C and D), each containing 1000 litres of a chemical. The chemical is being pumped from one tank to another as follows From A to B @ 20 litres/minute From C to A @ 90 litres/minute From A to D @ 10 litres/minute From C to D @ 50 litres/minute From B to C @ 100 litres/minute From D to B @ 110 litres/minute Which tank gets emptied first and how long does it take (in minutes) to get empty after pumping starts

1.  A, 16.66

2.  C, 20

3.  D, 20

4.  D, 25

View Answer  
4
Correct Answer :

D, 20


Explanation :
No Explanation available for this question

Two identical circles intersect so that their centres, and the points at which they intersect, form a square of side 1 cm. The area in sq. cm of the portion that is common to the two circles is

1.  π/ 4

2.  π /2-1

3.  π/ 5

4.  √2-1

View Answer  
4
Correct Answer :

π /2-1


Explanation :
No Explanation available for this question

A jogging park has two identical circular tracks touching each other, and a rectangular track enclosing the two circles. The edges of the rectangles are tangential to the circles.Two friends, A and B, start jogging simultaneously from the point where one of the circular tracks touches the smaller side of the rectangular track. A jogs along the rectangular track, while B jogs along the two circular tracks in a figure of eight. Approximately, how much faster than A does B have to run, so that they take the same time to return to their starting point

1.  3.88%

2.  4.22%

3.  3. 4.44%

4.  4.72%

View Answer  
4
Correct Answer :

4.72\%


Explanation :
No Explanation available for this question

In a chess competition involving some boys and girls of a school, every student had to play exactly one game with every other student. It was found that in 45 games both the players were girls, and in 190 games both were boys. The number of games in which one player was a boy and the other was a girl is

1.  200

2.  216

3.  235

4.  256

View Answer  
4
Correct Answer :

200


Explanation :
No Explanation available for this question
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