Mohan takes $20 m i n s$ to cover a distance of $3.2 k m$ due north on a bicycle, his velocity in $k m / h r$ -

$8.1$

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$9.6$

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$1.2$

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$7.2$

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Solution

The correct option is B
$9.6$

Step 1: Given
Time taken, $t = 20 m i n s = \frac{20}{60} h r = \frac{1}{3} h r$
Distance/displacement traveled, $d = 3.2 k m$
Let, $v$ be the velocity of the bicycle.
Step 2: Calculating the velocity
We know that,
$v e l o c i t y = \frac{d i s p l a c e m e n t}{t i m e}$
$v = \frac{d}{t}$
After substituting the values,
$v = \frac{3.2}{\frac{1}{3}} = 9.6 k m / h r$
Thus, the velocity of the bicycle is $9.6 k m / h r$ .
Hence, option B is the correct answer.

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Mohan takes 20mins to cover a distance of 3.2km due north on a bicycle, his velocity in km/hr-

Mohan takes $20 m i n s$ to cover a distance of $3.2 k m$ due north on a bicycle, his velocity in $k m / h r$ -