Question

一个长方体,相对两个面是边长为3.5分米的正方形,切成四块,表面积增加了424.5平方

Answer 1

(424.5-2*3.52)/2 * 3.5 *3.5

=(424.5-7.04)/2 * 3.5 *3.5

=417.46/2 * 3.5 *3.5

=208.73*3,5*3,5

=2556.9425