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Grade: 12

                        

A bicycle travels up a hill at an average speed of 4m/s and down the same hill through the same distance at an average speed of 8m/s. Express the average speed for the entire journey in terms oftandd.

6 years ago

Answers : (2)

RAVI KANT KUMAR
35 Points
							avg speed=total dist/total time
let s = dist covered
total dist=2s
total time=s/4 + s/8 = 3s/8
avg speed=16/3 m/s =5.33 m/s
						
6 years ago
raj
8 Points
							You have to speculate given this convoluted question. Let us assume that the time taken to travel up the hill istseconds. Then, the time taken to travel down the hill is 1/2 oftseconds as the speed now is twice than that of the former. The total distance traversed, we assume, is 2d metres. Hence, the average speed is:2d/(1/2 + 1)t.There you go. You might have realized that this question isn`t testing you on physics; rather, it is testing you on math.
						
6 years ago
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