Question

Tolong bantu ya
no 6, 7, dan 8

Answer 1

6.V = phi × r² × t
  7850 = 3,14 × r² × 25
  7850 = 78,5 × r²
  7850/78,5 = r²
  100 = r²
  r = 10 cm

7. Vtabung = phi × r² × t
   1540 = 22/7 × r² ×10
   1540 × 7 = 220 × r²
   10780/220 = r²
   49 = r²
   r = 7 cm.
kalau sisi alas prisma persegi sayang kurang tau

8. x ⇒ tinggi tabung kedua
7/14 = 10/x
7x = 14×10
7x = 140
x = 140/7
x = 20 cm

semoga benar :)