Login / Signup

Question

Speed of boat in downstream is 45% more than speed of boat in still water. If speed of stream is 9 km/h, then find the time taken by the boat to cover 81 km in downstream and 54 km in upstream.

A 10 hrs

B 7.7 hrs

C 6.5 hrs

D 8.9 hrs

E None of these

Practice Next

More Boats and streams Questions

If a man rows at the rate of 14 kmph in still water and his rate against the current is 5 kmph, then the man’s rate along the current is:  &nbsp...
To go 75 km downstream, a boat takes 5 hours. For the same 75 km upstream, it takes 10 hours more than that. What is the boat’s still-water speed?
If the sum of upstream and downstream speed is 30 km/hr and the speed of the current is 5 km/hr. Then find time taken to cover 40 km in downward?
Speed of a boat in still water is 15 kmph and speed of stream is 13 kmph. A man rows to a place at a distance of 56 km and come back to starting point. The...
A kayaker covers 64 km upstream and 96 km downstream in 8 hours and 6 hours, respectively. Find the time taken by the same kayaker to cover 140 km in still...
Speed of stream 'D' is 5 km/h more than speed of stream 'E'. Sum of upstream speed of a boat in 'D' and its downstream speed in 'E' is 45 km/h. Time taken ...
A man rows upstream 10 km and downstream 15 km taking 5 hours each. Find the speed of current.      
A boat can cover 120 km in upstream in 15 hours and 135 km in Downstream in 5 hours. Find the speed of boat in still water.
A boat travels 180 km downstream and 120 km upstream in 15 hours. If the ratio of the speed of the boat in still water to the speed of the stream is 2:1, t...
The speed of a boat in still water is 40% higher than the speed of the stream. The boat takes 4 hours to travel 96 km downstream. If the boat's speed in st...

Relevant for Exams:

Hey! Ask a query

ask-question