Intext example I — task. Science CBSE, Class 9.

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An object travels

$16\ m$ in

$4\ s$ and then another

$16\ m$ in

$2\ s$ . What is the average speed of the object?

The formula to calculate the average speed,

$=\ \frac{Total\ displacement}{Total\ time\ taken}$
$=\ {Total\ displacement} \times {Total\ time\ taken}$
$=\ {Total\ distance\ travelled} \times {Total\ time\ taken}$
$=\ \frac{Total\ distance\ travelled}{Total\ time\ taken}$

Average speed of the object

$=$

$m\ s^{-1}$

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