Management Aptitude Test 2018 Paper

Question : 97 of 200

Marks: +1, -0

A boatman goes 2 km against the current of the stream in 1 h and goes 1 km along the current in 10 min. How long will he take to go 5 km in stationary water?

60 min
75 min
90 min
40 min

Validate

Solution:

(b) Upstream speed =

2/1=2/60=1/30

km/min
Downstream speed =

1/10

km/min
Speed of boat in still water =

{1/30+1/10}/2

km/min
=

4/30×1/2=1/15

km/min
Time taken by boatman to go 5 km =

5/{1/15}

= 75 min

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