Sajal can ride a scooter constantly at a speed of 30 km/hr. draw a distance-time graph for this situation.
Use the graph drawn to find:
(i) The time taken by Sajal to ride 75 km
(ii) The distance covered by Sajal in $3 \frac{1}{2}$ hours
We have,
speed $=\frac{\text { distance }}{\text { time }}$
We have the following table for Distance-Time graph
| Time(hrs) | 1 | 2 | 3 | 4 |
| Distance(km) | 30 | 60 | 90 | 120 |
.png)
(i) Given speed = 30 km/hr , distance = 75 km
using formula we have
$30=\frac{75}{\text { time taken }}$
time taken $=2.5 \mathrm{hr}$
Hence, the time taken by Sajal to ride 75 km is 2.5 hr.
(ii) Given speed $=30 \mathrm{~km} / \mathrm{hr}$, time $=3 \frac{1}{2} \mathrm{hr}$
using formula we have,
$30=\frac{\text { distance }}{7 / 2}$
distance $=105 \mathrm{~km}$
Hence, the distance covered by Sajal in $3 \frac{1}{2}$ hours is $105 \mathrm{~km}$.