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16 . A, B and C can do a piece of work in 24, 30 and 40 days respectively. They start the work together but C leaves 4 days before the completion of the work. In how many days is the work done?
A. 15 days B. 14 days
C. 13 days D. 11 days

17 . Express a speed of 36 kmph in meters per second?
A. 10 mps B. 12 mps
C. 14 mps D. 17 mps

18 . Express 25 mps in kmph?
A. 15 kmph B. 99 kmph
C. 90 kmph D. None

19 . A car covers a distance of 624 km in 6 ½ hours. Find its speed?
A. 104 kmph B. 140 kmph
C. 104 mph D. 10.4 kmph

20 . In what time will a railway train 60 m long moving at the rate of 36 kmph pass a telegraph post on its way?
A. 9 sec B. 8 sec
C. 7 sec D. 6 sec




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