A car takes 20 minutes to cover a distance of 15 km. Calculate its speed in km/h and m/s.
Answers
Given data : A car takes 20 minutes to cover a distance of 15 km.
To find : Calculate its speed in km/h and m/s.
Solution : Now, according to given,
⟹ Time taken by car = 20 minute
⟹ Dustance covered by car = 15 km
Now, we need to convert, km to minute
⟹ 15 km = 15 * 1000 = 15000 metre
similarly, minute to seconds
⟹ 20 minute = 20 * 60 = 1200 seconds
Now, by formula
⟹ speed = distance/time
⟹ speed = 15000/1200
⟹ speed = 25/2
⟹ speed = 12.5 m/s
Now, we need to convert, minute to hour
⟹ 20 minute = 20/60 = 1/3 hour
Now, by formula
⟹ speed = 15/ ⅓
⟹ speed = 15 * 3
⟹ speed = 45 km/hr
Answer : Hence, the speed of car is 45 km/hr in km/hr and 12.5 m/s in m/s.
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