tolongggggg kerjakannnn nomorrr 31,32,33,&35. MENGGUNAKAN CARANYA YAAA

31) V = π × r² × t
9.504 = 22/7 × r² × 21
9.504 = 66 × r²
r² = 9.504 ÷ 66
r = √144
r = 12 cm ( D )

32) 43 kg ( C )

33) x = ( 3 × 7 ) + ( 4 × 8 ) + ( 4 × 9 ) + ( 1 × 10 ) / ( 3 + 4 + 4 + 1 )
x = ( 21 + 32 + 36 + 10 ) / 12
x = 99/12
x = 8,25 ( B )

35) 9 ( D )