Mathematics MCQs

Page No. 53

Speed of a boat in standing water is 9 kmph and the speed of the stream is 1.5 kmph. A man rows to a place at a distance of 105 km and comes back to the starting point. The total time taken by him is_________?


a16 hours


b18 hours


c20 hours


d24 hours


View Answer 24 hours

A man takes twice as long to row a distance against the stream as to row the same distance in favour of the stream. The ratio of the speed of the boat (in still water) and the stream is________?


a2 : 1


b3 : 1


c3 : 2


d4 : 3


View Answer 3 : 1

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__________?


a4.25 kmph


b6 kmph


c6.5 kmph


d8.5 kmph


View Answer 6.5 kmph

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?


a3


b4


c4 (1/2)


dInsufficient data


View Answer 3

A boat goes 100 km downstream in 10 hours, and 75 m upstream in 15 hours. The speed of the stream is________?


a7 km/h


b5 km/h


c3 km/h


d2 (1/2) km/h


View Answer 2 (1/2) km/h

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________?


a1 kmph


b5 kmph


c8 kmph


d3 kmph


View Answer 1 kmph

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_________?


a3


b7.5


c2.25


d1.5


View Answer 1.5

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________?


a10 kmph


b5 kmph


c20 kmph


d22 kmph


View Answer 20 kmph

A man can row upstream at 25 kmph and downstream at 35 kmph, and then find the speed of the man in still water?


a60 kmph


b10 kmph


c30 kmph


d5 kmph


View Answer 30 kmph

A boat can move upstream at 25 kmph and downstream at 35 kmph, then the speed of the current is_________?


a5 kmph


b10 kmph


c30 kmph


d15 kmph


View Answer 5 kmph

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