Question

an open box is made of wood 3 cm thick its external dimensions are 78 CM 51 cm and 83 cm find the cost of painting the inner surface at rupees 20 per metre square

Answer 1

first of all multiply 3cm and 78 cm then the rest . The answer of both you'll get convert them into meter and again multiply them there you will get a answer. You multiply that answer with 20 meter square. You'll get your answer. If you have any query than comment in the comment box