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________?

Boats and Streams 08/12/2020

A. 2km/hr
B. 3km/hr
C. 4 km/hr
D. 5 km/hr

Explanation:

Distance covered upstream in 45/4min =3/4 km

Distance covered upstream in 1 hr =(3/4 × 2/15 × 60) km/hr = 4 km/hr

Distance covered downstream in 15/2 min = ¾ km

Distance covered downstream in 1hr

= (3/4 × 2/15 × 60)km/hr = 6 km/hr

Speed of the man in still water

= ½ (6 + 4)km/hr = 5 km/hr

Related 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?
    A. 40 minutes B. 1 hour C. 1 hr 15 min D. 1 hr 30 min...
    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_________?
    A. 16 hours B. 18 hours C. 20 hours D. 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________?
    A. 2 : 1 B. 3 : 1 C. 3 : 2 D. 4 : 3...
    A steamer goes downstream from one port to another in 4 hours, it covers the same distance upstream in 5 hours. If the speed of the stream is 2km/hr,the distance between the two parts is_______?
    A. 50km B. 60km C. 70km D. 80 km...
    A boat covers a distance of 30 km in 2 ½ hours running downstream while returning it covers the same distance in 3 ¾ hours. What is the speed of the boat in still water?
    A. 8km/hr B. 12km/hr C. 14 km/hr D. 15 km/hr E. None of these...

Leave a Reply

Your email address will not be published. Required fields are marked *