Question 62

A car travels 120 km in 4 hours. Calculate its average speed in m/sec. [Give your answer correct to one decimal place].

Solution

A car travels 120 km in 4 hours.

Distance =120 km = 120000 m [Because we know that 1 km = 1000 m]

Time = 4 hours = $$4\times3600$$ [Because we know that 1 hour = 3600 seconds]

= 14400 seconds

Speed = $$\frac{Distance}{time}$$

= $$\frac{120000}{14400}$$

= $$\frac{25}{3}$$

= 8.3 m/s (approx.)

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