a car travels 30 km at a uniform speed of 40 km/h and the next 30 km at a uniform speed of 20 km/h .find its average speed
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Answered by
133
Average speed = Total distance / Total time
= (30 km + 30 km) / (t₁ + t₂)
= 60 km / [(30 km/40 kmph) + (30 km/20 kmph)]
= 60 km / (3/4 h + 3/2 h)
= 26.67 kmph
Average speed of car is 26.67 kmph
= (30 km + 30 km) / (t₁ + t₂)
= 60 km / [(30 km/40 kmph) + (30 km/20 kmph)]
= 60 km / (3/4 h + 3/2 h)
= 26.67 kmph
Average speed of car is 26.67 kmph
Answered by
28
Average speed Total distance / Total time
(30 km + 30 km) /(t1 + t2)
= 60 km /[(30 km/40 kmph) + (30 km/ 20 kmph)]
= 60 km (3/4 h + 3/2 h) - 26.67 kmph
Average speed of car is 26.67 kmph
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