Question

A racing car covered $600km$ in $3$ hours $20$ minutes. Find its speed in meter per second. How much distance will the car cover in $50$ sec?

Answer 1

Step1: Find the speed of car

Given: A racing car covers $600km$ in $3$ hours and $20$ minutes.

We need to calculate the speed in meters per second.

Distance $=600km$

$=600\times 1000m$

$=600000m$

Time $=3$ hours $20$ minutes

$=3$ ℎours $+20$ minutes

$=3\times 60$ minutes $+20$ minutes

[$1$ ℎour$=60$ min]

$=180$ min$+20$ mins

$=200$ mins

$=200\times 60sec$ [$1min=60sec$]

$=12000sec$

$\because$Speed$=\frac{\text{distance}}{\text{Time}}$

$=\frac{600000m}{12000sec}$

$=50m/s$

Step2: Calculate distance covered in $50$ second

Time $=50sec$

Speed $=50m/sec$

Speed $=\frac{\text{Distance}}{\text{Time}}$

$50m/s=\frac{\text{distance}}{50}$

Distance $=50\times 50$

$=2500m$

Hence, the distance covered by a car in $50$ second is $2500m$ or $2.5km$.