Express the speed $300 m$ in $15 s e c$ in $k m / h r$ .

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Solution

Conversion of units:
To get the speed, we know speed= distance/time. hence,
Speed = $\frac{300 m}{15 s} = 20 m / s$
We know that to change the speed in $m / s$ to speed in $k m / h r$ , we have to multiply by $\frac{18}{5}$ .
So, we can write,
$20 \times \frac{18}{5} = 72 k m / h r$
Hence, we can express speed $300 m$ in $15 s e c$ as $72 k m / h r$ .

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Express the speed 300min 15sec in km/hr.

Conversion of units:To get the speed, we know speed= distance/time. hence,Speed =300m15s=20m/sWe know that to change the speed in m/sto speed in km/hr, we have to multiply by 185. So, we can write,20×185=72km/hrHence, we can express speed 300min 15sec as 72km/hr .

Express the speed $300 m$ in $15 s e c$ in $k m / h r$ .