Boats & Streams Mcqs


Q.  The speed of a motor boat is that of the current of water as 36:5. The boat goes along with the current in 5 hours 10 min, it will come back in_______?

a. 5 hours 50 min
b. 6 hours
c. 6 hours 50 min
d. 12 hours 10 min


ANSWER: See Answer
 
Let the speed of motor boat be 36x km/hr and that of current of water be 5x km/hr

Speed downstream = (36x +5x)km/hr = 41x km/hr
Speed upstream = (36 -5x)km/hr = 31x km/hr
Distance covered downstream = (41x × 31/6)km
Distance upstream = [1271x/6 × 1/31x]hrs
= 41/6 hrs = 6hrs 50 min
MCQs:  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?
Category: Mathematics Quizzes,   Published by: teswesm
MCQs:  A boat can move upstream at 25 kmph and downstream at 35 kmph, then the speed of the current is_________?
Category: Mathematics Quizzes,   Published by: teswesm
MCQs:  A man can row upstream at 25 kmph and downstream at 35 kmph, and then find the speed of the man in still water?
Category: Mathematics Quizzes,   Published by: teswesm
MCQs:  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________?
Category: Mathematics Quizzes,   Published by: teswesm
MCQs:  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_________?
Category: Mathematics Quizzes,   Published by: teswesm
MCQs:  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________?
Category: Mathematics Quizzes,   Published by: teswesm
MCQs:  A boat goes 100 km downstream in 10 hours, and 75 m upstream in 15 hours. The speed of the stream is________?
Category: Mathematics Quizzes,   Published by: teswesm
MCQs:  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?
Category: Mathematics Quizzes,   Published by: teswesm
MCQs:  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__________?
Category: Mathematics Quizzes,   Published by: teswesm
MCQs:  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________?
Category: Mathematics Quizzes,   Published by: teswesm
MCQs:  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_________?
Category: Mathematics Quizzes,   Published by: teswesm
MCQs:  A man can row three-quarters of a kilometre against the stream in 11 minutes and down the stream in 7 minutes. The speed (in km/hr) of the man in still water is:_________?
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MCQs:  A boatman goes 2 km against the current of the stream in 1 hour and goes 1 km along the current in 10 minutes. How long will it take to go 5 km in stationary water?
Category: Mathematics Quizzes,   Published by: teswesm
MCQs:  A man can row 9 1/3 km/hr in still water and he finds that is thrice as much time to row u p than as to row down the same distance in river. The speed of the current is:________?
Category: Mathematics Quizzes,   Published by: teswesm
MCQs:  A boat travels upstream from B to A and downstream from A to B in 3 hours. If the speed of the boat in still water is 9km/hr and the speed of the current is 3km/hr, the distance A and B is:_______?
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MCQs:  The speed of a boat in still water is 2km/hr. If its speed upstream be 1km/hr then speed of the stream is________?
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MCQs:  A boat takes half time in moving a certain distance downstream than upstream. What is the ratio between the rate in still water and rate of current?
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MCQs:  A boatman goes 2 km against the current of the stream in 1 hour and goes 1 km along the current in 10 minutes. How long will he take to go 5km in stationery water?
Category: Mathematics Quizzes,   Published by: teswesm
MCQs:  A man can row 7 ½ kms on hour in still water and he finds that it takes hi twice as long to row down the river. The rate of stream is
Category: Mathematics Quizzes,   Published by: teswesm
MCQs:  A man can row three-quarters of a kilometer against the stream in 11 ¼ minutes and return in 7 ½ minutes. The speed of the man in still water is________?
Category: Mathematics Quizzes,   Published by: teswesm