3. An aquarium is in the form of a cuboid whose external measures are

1.	3. An aquarium is in the form of a cuboid whose external measures are 70 cm x 28 cm x35 cm. The base, side faces and back face are to be covered with coloured paper. Findf rest a n gular hall are 15 m Ă 12 m Ă 4 m. There are 4the area of the paper needed
Answer» Given length = 70cm breadth = 28 cm height = 35 cm. Area of base = l * b = 70 * 28 = 1960 Area of side base = b * h = 28 * 35 = 980 Area of back face = l * h = 70 * 35 = 2450. Area of the paper needed = 1960 + 2450 + 2(980) = 1960 + 2450 + 1960 = 6370 cm^2.

3. An aquarium is in the form of a cuboid whose external measures are 70 cm x 28 cm x35 cm. The base, side faces and back face are to be covered with coloured paper. Findf rest a n gular hall are 15 m Ă 12 m Ă 4 m. There are 4the area of the paper needed

Answer»

Given length = 70cm

breadth = 28 cm

height = 35 cm.

Area of base = l * b = 70 * 28 = 1960

Area of side base = b * h = 28 * 35 = 980

Area of back face = l * h = 70 * 35 = 2450.

Area of the paper needed = 1960 + 2450 + 2(980)

= 1960 + 2450 + 1960

= 6370 cm^2.