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Grade: 12th
        A bus travelling first one third dist. at speed 10 km/h and next one fourth at ...
2 years ago

Answers : (1)

Arun
23739 Points
							
the total distance covered be x
thus
time takes to travel 1/3x = t1 = x/30
 
time taken to travel 1/4x = t2 = x/80
 
time taken to travel the rest = t3 = 5x/480 = x/96
 
thus average speed = total distnace/total time taken = 1/(1/30 + 1/80 + 1/96) kmph
Regards
Arun (askIITians forum expert)
2 years ago
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