Question

A racing car completing 100 m straight in 2 seconds. What is the average speed of a car that travels for 3 hours and covers 40 km in the first hour, 45 km in the second hour, and 35 km in the third hour?

Answer 1

$\sf\small\red{Given:-}$

$\bullet\rm \: speed \: in \: 1 \: hour = 45 \: \frac{(kilometres)}{(hour)}$

$\bullet\rm \: speed \: in \: 2 \: hour = 40 \: \frac{(kilometres)}{(hour)}$

$\bullet\rm \: speed \: in \: 3 \: hour = 45 \frac{(kilometres)}{(hour)}$

$\sf\small\red{Find:-}$

$\bullet\rm \: average \: speed \: of \: car.$

$\sf\small\red{Solution:-}$

Now,We know that.

$\rm average \: speed = \frac{total \: distance}{time}$

$\rm \rightarrow \frac{45 + 40 + 35}{3}$

$\rm \rightarrow \frac{120}{3}$

$\rm \rightarrow \red {40 \: \frac{kilometres}{hour} }$

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