圆周长=3.14x10=31.4 侧面积=31.4x12=376.8圆半径=10÷2=5顶底面积=2x3.14x5x5=157表面积=376.8+157=533.8
s1=圆周率*d1 s2=s1*h s=2s1+s2=140*圆周率
