Question

1. A cardboard box open from the top is 1.5 m
long, 1.25 m broad and 65 cm deep. Find the
area of cardboard required to make the box.
Ignore the thickness of cardboard.​

Answer 1

Answer:

Step-by-step explanation:

Here, l = 1.5 m, b = 1.25 m                 ∵ It is open from the top.                 ∵ Its surface area = [Lateral surface area] + [Base area]                 = [2(l + b)h] + [l × b]                 = [2(1.50 + 1.25)0.65 m2] + [1.50 × 1.25 m2]                 = [2 × 2.75 × 0.65 m2] + [1.875 m2]                 = 3.575 m2 + 1.875 m2 = 5.45 m2                 ∵ The total surface area of the box = 5.45 m2                 ∴ Area of the sheet required for making the box = 5.45 m2