Mathematics MCQs

Page No. 73

P and Q need 8 days to complete a work. Q and R need 12 days to complete the same work. But P, Q and R together can finish it in 6 days. How many days will be needed if P and R together do it?


a7


b8


c9


d10


View Answer 8

Running at the same constant rate, 6 identical machines can produce a total of 270 bottles per minute. At this rate, how many bottles could 10 such machines produce in 4 minutes?


a2700


b1080


c450


d1800


View Answer 1800

A alone can finish a work in X days. B alone can finish the same work in X+5 days. Together, they take 6 days to complete the work. Find X


a12


b8


c10


d9


View Answer 10

A can do (1/3) of a work in 5 days and B can do (2/5) of the work in 10 days. In how many days both A and B together can do the work ?


a75/8 days


b44/6 days


c48/5 days


dNone of these


View Answer 75/8 days

A leak in the lower portion of a tank can empty the full tank in 9 hrs. An inlet pipe fills water at the rtae of 10 lit. a minute. When the tank is full, the inlet is opened and due to leak, the tank is empty in 16 hrs. How many litres does the cistern hold ?


a12,342 litres.


b12,444 litres


c12,566 litres.


dNone of these


View Answer 12,342 litres.

12 buckets of water fill a tank when the capacity of each bucket is 13.5 litres. How many buckets will be needed to fill the same tank, if the capacity of each bucket is 9 litres?


a14


b15


c16


d18


View Answer 18

A completes 80% of a work in 20 days. Then B also joins and A and B together finish the remaining work in 3 days. How long does it need for B if he alone completes the work?


a37 ½ days


b22 days


c31 days


d22 days


View Answer 37 ½ days

Kamal will complete work in 20 days. If Suresh is 25% more efficient than Kamal, he can complete the work in________days.


a14


b16


c15


d11


View Answer 16

P can do a work in 24 days. Q can do the same work in 9 days and R can do the same in 12 days. Q and R start the work and leave after 3 days. P finishes the remaining work in_________days.


a10


b9


c11


d12


View Answer 10

Jameel can complete a task in 15 hours and Nasir can complete the same task in 12 hours. Jameel starts the task at 9:00 am and stops working at 2:00pm. Nasir starts working on the task at 4:00 pm. At what time is the task completed?


a12:00 pm


b2:00 am


c12:00 am


d10:00 pm


View Answer 12:00 am

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