Question

The volume of a cuboid is 280cmcube if the length is 8cm and the breadth is 7cm what is the height

Answer 1

V = L * W * H cm^3

Given L = W + 3 cm

Replace L with W + 3 cm

280 = ((W + 3) * W ) * 4 cm

70 = W^2 + (3 * W) cm

Rearrange and solve quadratic equation for W cm

W^2 + 3W -70 = 0

W = -10 or 7 cm

W = 7 cm

L = W + 3 = 10 cm

Check: V = 280 = L * W * H cm^3

= 10 cm * 7 cm * 4 cm = 280 cm^3… OK

Answer 2

Answer:

Step-by-step explanation:

the answer is 5cm