Question

an aquariums is in the form of a cuboid whose external measures are 90cm*40cm*50cm. the bottom, side face and back face are to be covered with a colour paper. find the area of the paper needed.

Answer 1

18000cm*2 of paper sheet is needed

Answer 2

Given l = 90,b=40,h=50cm.

Bottom Area = l * b = 3600 sq.cm

Side face area = b * h = 40 * 50 = 2000

Back face area = l * h = 90 * 50 = 4500.

Area of the paper needed = 3600 + 4500 + 2(2000)

                                             = 12100 sq.cm.