Question

A cyclist rides 300 m up a slope in 50 s. She then rides 300 m down the slope in 25 s. What is her average speed for the whole journey?

Answer 1

Answer:

Cyclist rides 9 m per sec

Answer 2

Answer:

8m/s

Explanation:

~Journey 1 (from down to up of the hill ) = 300m

Time Taken to cover Journey 1 = 50 seconds

Journey 2 ( from up to down of the hill ) = 300m

~Time Taken to cover Journey 2 = 25 seconds

~Distance covered in full journey

= Distance travelled in journey 1 + Distance travelled in journey 2

• 300+300=600m

~Time Taken to cover the distance in both journey =

=Time taken to cover journey 1 + Time taken to cover journey 2

•50+25=75 seconds

~Average speed of the Journey

=Total Distance Travelled / Time taken to cover the total distance

• 600/75 = 8 m/s