CE Physics - Position&Movement
A car travels from town A to town B. It first moves at a speed of 60km/h for 20 minutes and then at 80km/h for the rest of time. What is the car’s average speed if the distance between town A and town B is 60km ?
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- 匿名Lv 71 十年前最愛解答
A car travels from town A to town B. It first moves at a speed
of 60km/h for 20 minutes and then at 80km/h for the rest of time. What
is the car’s average speed if the distance between town A and town B is
60km ?
Time used for finished the way
= (60-60/3)/80 + 1/3
= 5/6 hrs
Average speed
= 60/(5/6)
= 72 km/h
資料來源: Hope can help you^^”
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