题目内容
求表面积.

圆柱的2个底面积:3.14×(5÷2)2×2,
=3.14×6.25×2,
=3.14×12.5,
=39.25,
圆柱的侧面积:3.14×5×5,
=3.14×25,
=78.5,
圆柱的表面积:39.25+78.5=117.75,
答:圆柱的表面积是117.75.
=3.14×6.25×2,
=3.14×12.5,
=39.25,
圆柱的侧面积:3.14×5×5,
=3.14×25,
=78.5,
圆柱的表面积:39.25+78.5=117.75,
答:圆柱的表面积是117.75.
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