钟面的分针长6厘米,从7时到11时,分针的针尖走多少厘米?时针长5厘米,一昼夜针尖端走多少厘米?

问题描述:

钟面的分针长6厘米,从7时到11时,分针的针尖走多少厘米?时针长5厘米,一昼夜针尖端走多少厘米?

(1)2×3.14×6×(11-7)
=6.28×6×4
=37.68×4
=150.72(厘米)
(2)2×3.14×5×2,
=6.28×10
=62.8(厘米)
答:从7时到11时,分针的针尖走150.72厘米;,一昼夜时针尖端走62.8厘米.
故填:150.72、62.8.