Question

已知直四棱柱的底边是边长为a的正方形,高为h体积为v表面积为s

Answer 1

v=12 s=32

v=a²h=12

s=2a²+4ah=32

( 2a²+4ah)/(a²h)=2(a+2h)/(ah)=32/12

(2h+a)/(ah)=32/12×1/2=4/3

2/a+1/h

=(2h+a)/ah

=4/3