题目
一种压路机的滚筒是圆柱体,它的长是1.5米,滚筒的半径是0.5米,如果每分钟滚15周,每小时可以压路多少平方米?
提问时间:2020-08-01
答案
1小时=60分,
3.14×2×0.5×1.5,
=3.14×1.5,
=4.71(平方米);
4.71×15×60,
=70.65×60,
=4239(平方米).
答:这种压路机每小时可以压路面4239平方米.
3.14×2×0.5×1.5,
=3.14×1.5,
=4.71(平方米);
4.71×15×60,
=70.65×60,
=4239(平方米).
答:这种压路机每小时可以压路面4239平方米.
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