Question

# A car covers 160 km at a speed of 40 km/hr and the next 120 km at a speed of 60 km/hr calculate its average speed.

Solution
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#### As we know thatspeed=distancetimeTime taken by the car t travel 160km when travelling with the speed of 40km/hr=16040=4 hourTime taken by the car t travel 120km when travelling with the speed of 60km/hr=12060=2 hourNow,Total distance travelled by the car =160+120=280kmTotal time taken =4+2=6 hoursTherefore,Average speed =Total distancetotal time=2806=46.67km/hr

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