Question

A car travels 20 km in 20 minutes. find the speed in ms-1

Answer 1

Answer:

Distance travelled by car=20km or 20000m

Time taken= 20 mins or 1200 sec. or 1/3hr

Speed of the car=60km/hr or 16.66 m/s

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Answer 2

Speed of the car in ms⁻¹ is 50/3 ms⁻¹

Given:

A car can travel 20 km in 20 mins

To find:

The speed of car in ms⁻1

Solution:

Given a car can travel 20 km in 20 mins

Here,

20 km = 20 × 1000 m = 20000 m  [ ∵ 1 km = 1000 meters ]

20 mins = 20 × 60 sec = 1200 sec  [ ∵ 1 min = 60 sec ]

So we can say that the car will travel 20000 m in 1200 sec  

The distance travel by the car in 1 sec = 20000 m/ 1200

= 200/12 = 50/3 meter per sec

Therefore, speed of the car in ms⁻¹ is 50/3 ms⁻¹

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