Kak Tolong Donk Please...

1. volume = 8 x 10 x 15 = 1200
_luas jaring= 2(8x10) + 2(8x15) + 2(10x15)
_________= 160 + 240 + 300 = 700

2. volume =π •r^2• t
________= 22/7 • 14•14•20 = 44•260= ......
luas jaring=π • d • t + 2(π • r^2)
________= 22/7 • 28 + 2(22/7•14•14)
________= 88 + 2(44•14) = 88 + 88•28=.....

3. volume = 8•6•9 : 2 = 216
luas jaring= 2(9x6) + 9x8 + 6x8 =108 + 72 + 48 = 238