Question

Find the distance covered by a vehicle when the speed is 120 km/hour and the time taken is 6 hours 40 minutes.

Answer 1

Answer:

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Step-by-step explanation:

Solution:

(a) the distance travelled in first hour = 1km

Distance travelled in second hour = 0.5 km

Distance travelled in third hour = 0.3 km

Total time taken = 3 hr

Total distance travelled = 1 + 0.5 + 0.3 = 1.8 km

(i) average speed in km h^{-1}h

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Speed = distance/ time taken

= 1.8 km / 3 hr

= 0.6 km h^{-1}h

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Average speed in m s^{-1}s

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1km = 1000 m

1.8 km = 3600 seconds

3 hour = 3600 3

= 10800 sec

Average speed = D/T

= 1800/ 10800

= 0.167 m s^{-1}s

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