Mathematics MCQs

Page No. 70

Two pipes can fill a tank in 10 hrs. and 12 hrs. respectively while a third pipe empties the full tank in 20 hrs. If all the three pipes operate together , in how much time the tank will be filled ?


a7.5 hrs


b5 hrs


c7 hrs


dNone of these


View Answer 7.5 hrs

If two pipes function together, the cistern will be filled in 6 hrs. One pipe fills the cistern 5 hrs. faster than the other. How many hours it take the second pipe to fill the cistern?


a5 hrs


b10 hrs


c15 hrs


d20 hrs


View Answer 15 hrs

A can do a particular work in 6 days . B can do the same work in 8 days. A and B signed to do it for Rs. 3200. They completed the work in 3 days with the help of C. How much is to be paid to C?


aRs. 380


bRs. 600


cRs. 420


dRs. 400


View Answer Rs. 400

A can complete a work in 12 days with a working of 8 hours per day. B can complete the same work in 8 days when working 10 hours a day. If A and B work together, working 8 hours a day, the work can be completed in_______days.


a5 5⁄11


b4 5⁄11


c6 4⁄11


d6 5⁄11


View Answer 5 5⁄11

P and Q can do a work in 30 days. Q and R can do the same work in 24 days and R and P in 20 days. They started the work together, but Q and R left after 10 days. How many days more will P take to finish the work?


a10


b8


c18


d19


View Answer 18

If X and Y complete a certain work in 10 days, Y and Z in 16 days and X and Z in 22 days, find the time required for each one to complete the work while working separately.


a120, 40, 60 days


b120, 60, 80 days


c40, 30, 120 days


d30, 40, 60 days


View Answer 120, 40, 60 days

A and B can finish a piece of work in 20 days .B and C in 30 days and C and A in 40 days. In how many days will A alone finish the job?


a48


b34(2/7)


c44


d45


View Answer 48

Bilal can do a work in 15 days and Jalal in 12 days. If they work on it together for 4 days, the fraction of work that is left is________?


a3/5


b4/7


c2/5


d1/4


View Answer 2/5

2 men and 12 women can finish a job in 4 days. 4 men and 6 women can do the same job in 5 days. Find the time taken by 1 man and 1 woman to complete the job.


a30 days


b25 days


c24 days


d20 days


View Answer 24 days

A alone can finish a work in 10 days and B alone can do it in 15 days. If they work together and finish, then out of a total wages of Rs.75. A will get:___________?


a35 Rs.


b40 Rs.


c45 Rs.


dNone of these


View Answer 45 Rs.

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