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21 . A train 240 m in length crosses a telegraph post in 16 seconds. The speed of the train is?
A. 50 kmph B. 52 kmph
C. 54 kmph D. 56 kmph

22 . The speed of a car is 90 km in the first hour and 60 km in the second hour. What is the average speed of the car?
A. 72 kmph B. 75 kmph
C. 30 kmph D.  80 kmph

23 . Walking with 4/5 of my usual speed, I miss the bus by 5 minutes. What is my usual time?
A. 35 min B. 30 min
C. 25 min D. 20 min

24 . If a man walks to his office at ¾ of his usual rate, he reaches office 1/3 of an hour late than usual. What is his usual time to reach office?
A. 1 hour B. 2 hour
C. 3 hour D. 4 hour

25 . Walking 7/6 of his usual rate, a boy reaches his school 4 min early. Find his usual time to reach the school?
A. 25 min B. 26 min
C. 27 min D. 28 min




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