Physics, asked by studybuddy206, 1 year ago

please help with full explanation​

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Answered by expertans
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Answer:

Explanation:

The distance while driving from Home to School = S

Assume time taken by Abdul to cover this distance = t1

Distance Abdul covers while driving from School to Home = S

Assume time taken by Abdul to cover this distance = t2

Average speed from home to school v1av = 20 km h-1

Average speed from school to home v2av = 30 km h-1

Also Time taken from Home to School t1 =S / v1av

Similarly, Time taken from School to Home t2 =S/v2av

Total distance from home to school and backward = 2 S

Total time taken from home to school and backward (T) = S/20+ S/30

Therefore,

Average speed (Vav) for covering total distance (2S) = Total Dostance/Total Time

= 2S / (S/20 +S/30)

= 2S / [(30S+20S)/600]

= 1200S / 50S

= 24 kmh-1

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