If a car travels a distance of 100 km and comes back in 5 hours. Find the average speed of the car.

10 km/h

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20 km/h

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40 km/h

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80 km/h

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Solution

The correct option is C
40 km/h

Distance travelled by car = 100km + 100 km ( $∵$ It came back to the starting point after travelling 100 km)

= 200 km

Time taken by the car = 5 hours

$∵$ $A v e r a g e s p e e d$ = $\frac{Total distance}{Total time taken}$

$\Rightarrow$ Average speed of the car = $\frac{200}{5}$

= 40 km/h

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If a car travels a distance of 100 km and comes back in 5 hours. Find the average speed of the car.

The correct option is C 40 km/h Distance travelled by car = 100km + 100 km (∵ It came back to the starting point after travelling 100 km) = 200 km Time taken by the car = 5 hours ∵ Average speed = Total distanceTotal time taken ⇒ Average speed of the car = 2005 = 40 km/h