一根长15m的绳子绕一棵圆形树干10圈后,还剩下2.44m,树干的横截面的直径是多少米?

2026-05-20 22:54:02
推荐回答(2个)
回答1:

 

回答2:

(15-2.44)÷10
=12.56÷10
=1.256
1.256÷3.14=0.4m