The average reaction time of a driver in applying the brake is 3 second. how far will a car travel in this time if its speed is 80km/h?
我翻译的:一个司机应用的刹车的平均反动次数是3秒.如果他的速度是8km/h.这辆车能走多远?
第2题:peodro jogs at a constant rate on a 1/10 kilometer circular track at the health club.he completes a lap in 31 seconds.if he continues to jog at the same rate,find the time he takes to run 8 km.
peodro慢走的恒久速度率是在1/10的健身房的环行跑道上.他完全走完一圈要31秒.如果他继续慢走并使用同样的速度比率.求出他跑的8千米.