If m men can paint a house in d days, how many days will it take (m + 2) men to paint the same house ?
md + 2
md - 2
Machine A produces 100 parts twice as fast as machine B does. Machine B produces 100 parts in 40 minutes. If each machine produces parts at a constant rate, how many parts does machine A produce in 6 minutes ?
30
27
21
17
If cats sleep of every day, how many full days would a cat sleep in a four - day period ?
3 day
How far in kilometres can Sumit drive into the country if he drives out at 40 kilometres per hour (kmph), returns over the same road at 30 kmph, and spends 8 hours away from home, including a one hour stop for lunch ?
95
120
164
180
Riya worked one weekend from 9:00 a.m. until 4:30 p.m. at the rate of per hour. How much did she receive for both days ?
An empty pool being filled with water at a constant rate takes 8 hours to fill to of its capacity. How much more time will it take to finish filling the pool ?
4 hrs. 30 mins.
5 hrs. 20 mins.
6 hrs. 48 mins.
7 hrs. 12 mins.
Two trains, 121 metres and 99 metres in lengths, are running in opposite directions, one at the rate of 40 km per hour and the other rate of 32 km per hour. In how much time will they be completely clear from one another from the moment they meet ?
10 seconds
11 seconds
16 seconds
21 seconds
A father can do a job in a certain number of hours. His son takes twice as long to do the job. Working together, they can do the job in 6 hours. How many hours does it take the father to do the job alone ?
9 hrs
18 hrs
24 hrs
27 hrs
A certain copy machine produces 13 copies in every 10 seconds. If the machine operates without interruption, how many copies will it produce in an hour ?
78
4680
1800
2808
A school has enough bread to feed 30 students for 4 days. If 10 more students are added, how many days will the bread last ?
5
3