Boats and Streams

Quantitative Aptitude (HP Allied)

Title

45:30

Video Progress

8 of 24 completed

Notes Progress

5 of 15 completed

MCQs Progress

38 of 100 completed

Subjective Progress

8 of 20 completed

Continue to Next Topic

Indian Economy - Understanding the basics of Indian economic system

Next Topic

Download Solution PDF

Anil can row 18 kmph in still water and he finds that it takes him twice as long to row up as to row down the river. Find the rate of stream?

5 kmph

6 kmph

4 kmph

3 kmph

Explanation:

?Option B
Solution:
Stream Speed = a kmph
Time Taken = x km
Downstream speed = (18 + a) kmph
Upstream speed = (18 – a) kmph
Time taken to travel downstream = 2 * Time taken to travel upstream
(18 + a) / x = 2(18 + a) / x
18 + a = 36 – 2a
3a = 18
a = 6 kmph
OR USE FORMULA
Speed of boat = [tu+td]/[tu-td] * Speed of stream
So 18 = [2x + x]/[2x – x] * Speed of stream

By: Sandeep Dubey

Profile ResourcesReport error

Trial Period Ended