Question

Length and breadth of a bulletin board are r cm and t cm, respectively.

If 500 sq cm extra cloth per board is required to cover the edges, what will be the total area of the cloth required to cover 8 such boards?

Answer 1

We have given, length of the board = r cm and breadth = t cm.

Area of the cloth required for 1 board = Area of the board

= Length × Breadth

= r cm × t cm

= (rt) sq cm

Area of the cloth required for 8 boards = 8 × (rt) sq cm

= 8rt sq cm

But 500 sq cm extra cloth per board is required to cover the edges.

∴ For 8 boards we need 8 × 500 sq cm = 4000 sq cm extra cloth.

Thus, the total area of the cloth required = (8rt + 4000) sq cm