981. A person can swim in still water at 4 km/h. If the speed of water 2 km/h, how many hours will the man take to swim back against the current for 6km??
A. 3
B. 4
C. 4 (1/2)
D. Insufficient data

982. A boat goes 100 km downstream in 10 hours, and 75 m upstream in 15 hours. The speed of the stream is________??
A. 7 km/h
B. 5 km/h
C. 3 km/h
D. 2 (1/2) km/h

983. A man can row his boat with the stream at 6 km/h and against the stream in 4 km/h. The man’s rate is________??
A. 1 kmph
B. 5 kmph
C. 8 kmph
D. 3 kmph

984. A man can swim in still water at 4.5 km/h, but takes twice as long to swim upstream than downstream. The speed of the stream is_________??
A. 3
B. 7.5
C. 2.25
D. 1.5

985. A man can row with a speed of 15 kmph in still water. If the stream flows at 5 kmph, then the speed in downstream is________??
A. 10 kmph
B. 5 kmph
C. 20 kmph
D. 22 kmph

986. A man can row upstream at 25 kmph and downstream at 35 kmph, and then find the speed of the man in still water??
A. 60 kmph
B. 10 kmph
C. 30 kmph
D. 5 kmph

987. A boat can move upstream at 25 kmph and downstream at 35 kmph, then the speed of the current is_________??
A. 5 kmph
B. 10 kmph
C. 30 kmph
D. 15 kmph

988. A man swims downstream 30 km and upstream 18 km taking 3 hours each time, what is the speed of the man in still water??
A. 2 kmph
B. 8 kmph
C. 16 kmph
D. 4 kmph

989. The average weight of 16 boys in a class is 50.25 kg and that of the remaining 8 boys is 45.15 kg. Find the average weights of all the boys in the class.?
A. 47.55 kg
B. 48 kg
C. 48.55 kg
D. 49.25 kg

990. If a man rows at the rate of 5 kmph in still water and his rate against the current is 3.5 kmph. then the man’s rate along the current is__________??
A. 4.25 kmph
B. 6 kmph
C. 6.5 kmph
D. 8.5 kmph

NOTE
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