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(苏科版七年级下册108页问题4)运动场环形跑道长400 m,小红跑步的速度是爷爷的5/3倍,他们从同一起点沿跑道的同一方向同时出发,5 min后小红第一次追上爷爷,请求出小红与爷爷的速度.这是一个环形跑道上的追及问题,今天我们就从这个问题出发研究一下行程问题中的追及问题.拓展一运动场环形跑道长400 m,小红跑步的速度是爷爷的53倍,他们从同一起点沿跑道的同一方向同时出发,5 min后
(Su Ke version of the seventh grade 108 questions page 4) stadium ring runway length 400 m, red running speed is 5/3 times the grandfather, who from the same starting point in the same direction along the runway at the same time, 5 min after the red For the first time catch up with Grandpa, the request of the speed of red and grandfather.This is a catch-up on a circular runway, today we start from this problem to study the problem of catch-up problem.Expansion of a stadium circular runway length 400 m , Red running speed is 53 times the grandfather, who from the same starting point in the same direction along the runway at the same time, 5min later