Prameela painted the outer surface of a cabinet of measures 1m × 2m �

1.	Prameela painted the outer surface of a cabinet of measures 1m × 2m × 1 .5m. Find the surface area she cover if she painted all except the bottom of the cabinet?
Answer» The area of outer surface of a cabinet except the bottom of the cabinet will be equal to its lateral surface area. I = lm, b = 2m, h = 1.5m. A = 2h(l + b) = 2 × 1.5(1 + 2) = 3 × 3 = 9 m².

Prameela painted the outer surface of a cabinet of measures 1m × 2m × 1 .5m. Find the surface area she cover if she painted all except the bottom of the cabinet?

Answer»

The area of outer surface of a cabinet except the bottom of the cabinet will be equal to its lateral surface area.

I = lm, b = 2m, h = 1.5m.

A = 2h(l + b)

= 2 × 1.5(1 + 2)

= 3 × 3 = 9 m².