Question

Bantu jawab yaaa no 31&32.pake cara.
Thanks

Answer 1

31. r tab= 7
t tab= 10

v= pi r^2 t
= 22/7 x 7 x 7 x 10 ( 7 nya coret )
= 22 x 7 x 10
= 1.540

t kerucut + tab= 28
t k= 28-10
= 18
r= 7

v= 1/3 x 22/7 x 7 x 7 x 18 ( 7 dr 22/7 dicoret jd tujuh tinggal satu aja)
= 1/3 x 154 x 18
= 924

v= v tab+v kerucut
= 1540 + 924
= 2464 (b)

32. v = la . t
6000 = 30 . 4 . t
6000 = 120 . t
t = 6000 : 120
t = 50 (d)