A matchbox is 4 cm long, 2.5 cm broad and 1.5 cm in height. Its outer

1.	A matchbox is 4 cm long, 2.5 cm broad and 1.5 cm in height. Its outer sides are to be covered exactly with craft paper. How much paper will be required to do so?
Answer» Length of the matchbox (l) = 4 cm, breadth (b) = 2.5 cm, height (h) = 1.5 cm ∴ Total surface area of the matchbox = 2 (lb + bh + lh) = 2 (4 × 2.5 + 2.5 × 1.5 + 4 × 1.5) = 2 (10 + 3.75 + 6) = 2 × 19.75 = 39.5 sq. cm. ∴ 39.5 sq. cm paper will be required.

A matchbox is 4 cm long, 2.5 cm broad and 1.5 cm in height. Its outer sides are to be covered exactly with craft paper. How much paper will be required to do so?

Answer»

Length of the matchbox (l) = 4 cm, breadth (b) = 2.5 cm, height (h) = 1.5 cm

∴ Total surface area of the matchbox = 2 (lb + bh + lh)

= 2 (4 × 2.5 + 2.5 × 1.5 + 4 × 1.5)

= 2 (10 + 3.75 + 6)

= 2 × 19.75

= 39.5 sq. cm.

∴ 39.5 sq. cm paper will be required.