**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