tolong bantu jawab yaaa pakai caranya juga

LuasAlas = akar(s(s-a)(s-b)(s-c))
a= 5 ; b = 7 ; c = 8
s = 1/2×(5+7+8) = 1/2×20 = 10

LuasAlas = akar(10(10-5)(10-7)(10-8)) = akar(10×5×3×2) = akar300 = 10akar3

Volume = LuasAlas × t = 10 akar3 × 10 = 100akar3
jwb.B