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Speed

A car takes 4...

Question

A car takes 4 hours to travel a distance of 320 km. What is its average speed for the journey?

$40 k m h^{- 1}$

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$60 k m h^{- 1}$

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$80 k m h^{- 1}$

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$100 k m h^{- 1}$

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Solution

The correct option is (B) $80 k m h^{- 1}$

Step 1, Given data
Distance = 320 km
Time= 4 hrs
Step 2, Finding the speed
We know,

speed = $\frac{d i s t a n c e}{t i m e}$
Putting all the values

speed = $\frac{320}{4} = 80 k m h^{- 1}$

Hence the average speed is 80 km/h

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