#### Question

A car travels a distance of 15 km in 20 minute. Find the speed of the car in km h^{-1}.

#### Solution

istance travelled by car =15 km

Time taken = 20 minutes

(i) Speed of car in km h^{-1}

Convert 20 minutes to hour

1 minute = `1/60` hour

∴ 20 minutes = `(1 × 20)/ 60` = `1/3` hour

Speed of car = ` (Distance)/(Time taken )`

= `(15 km )/( 1/3 h)`

= 15 km × 3`h^-1` = 45 km `h^-1` = 45 km `h^-1`

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Solution A Car Travels a Distance of 15 Km in 20 Minute. Find the Speed of the Car in Km H-1 . Concept: Concept of Physical Quantities and Measurement.