The side area of a cylinder is 942cm2, its volume is 2355cm3, and its bottom area is______  cm2.

The side area of a cylinder is 942cm2, its volume is 2355cm3, and its bottom area is______  cm2.

According to the stem analysis, we can get: the radius of the bottom of the cylinder: 2355 ^ (942 ^) 2, = 2355 ^ 471, = 5 (CM), 3.14 × 52 = 78.5 (square cm), answer: the bottom area is 78.5 square cm. So the answer is: 78.5