Delhi Police Constable 2008 Paper

Question : 6 of 100

Marks: +1, -0

It takes 15 minutes for a person to sail a boat to 1 km. in the direction of wind and 20 minutes in the opposite direction of the wind. How much is the velocity of the wind?

1 km/hr
3/4 km/hr
1/4 km/hr
1/2 km/hr

Validate

Solution:

Movement in the direction of wind

=1/{1{/}3}

=3 km/hr
movement in opposite direction of wind

=1/{1{/}4}=4

km/hr
i.e., speed of wind

=1/2(4-3)

=1/2

km/hr

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