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一個圓柱形游泳池,底面周長為62.8米,深2米.

(1)在池內側面和池底抹上水泥,抹水泥的面積多少平方米?

(2)水面離池口0.5米,這時池里的水有多少立方米?

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正確答案:

(1)圓柱的底面半徑:

62.8÷(2×3.14),

=62.8÷6.28,

=10(米);

抹水泥部分的面積:

62.8×2.5+3.14×102

=157+3.14×100

=157+314

=471(平方米)

答:抹水泥的部分是471平方米.

(2)游泳池內水的體積:3.14×102×(2.5-0.5)

=3.14×100×2

=628(立方米)

答:這個游泳池水的體積是628立方米

答案解析:

暫無解析

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