Question

18. An open box is made of wood 2.5 cm thick
Its external dimensions are 80 cm, 65 cm and
45 cm. Find the cost of painting the inner
surface of the box at 31.50 per 100 cm?​

Answer 1

Answer:

3420g

Step-by-step explanation:

=234000 cm3

=[80-(2.5*2]cm = (80-5) cm

=[65-(2.5*2]cm = (65-5) cm

=(45-2.5cm = 42.5 cm

=(234000 - 191250)cm3 = 42750 cm3