NTSE Stage 2 MAT 2015 Question Paper

Question : 24 of 100

Marks: +1, -0

A boat starts with the speed of 1 km per hour. After every 1 km, the speed of boat becomes twice. How much will be the average speed of the boat at the end of journey of 2.5 km?

$2.5/1.5125$
$2.5/1.75$
$2.5/1.625$
$2.5/1.50$

Validate

Solution:

Average speed of a boat

=2.5/{1/1+1/2+0.5/4}

km/h

=2.5/{1+0.5+1/8}=2.5/{1.5+0.125}

=2.5/1.625

km/h

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