A car travels along a straight line for the first half time with a speed of 40 km /hour and the second half time with a speed of 600 km/hour .find the average speed of the car.
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Answered by
5
the formula for average speed = total distance/total time.
let the time taken is t hours.
so distance traveled in first t/2 hours.
=40×t/2=20t.
distance traveled in second t/2 hours.
=60(t/2)=30t.
so total distance=20t +30t=50t km.
average speed=50t/t=50kmph
let the time taken is t hours.
so distance traveled in first t/2 hours.
=40×t/2=20t.
distance traveled in second t/2 hours.
=60(t/2)=30t.
so total distance=20t +30t=50t km.
average speed=50t/t=50kmph
Answered by
0
60+40=100
100/2=50............
100/2=50............
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