Question

9. Length and breadth of a bulletin board are r cm and t cm, respectively.
a) What will be the length (in cm) of the aluminum strip required to frame the
board, if 10 cm extra strip is required to fix it properly.
b) If x nails are used to repair one board, how many nails will be required to repair
15 such boards?
c) If 500 sq. cm extra cloth per board is required to cover the edges, what will be the
the total area of the cloth required to cover 8 such boards?
d) What will be the expenditure for making 23 boards, if the carpenter charges Rs.x
per board?

Answer 1

Answer:

We have given, length of the board = r cm and breadth = t cm. But 10 cm extra strip is required to fix it properly. ∴ Total length of the aluminium strip = 2(r + t) cm + 10 cm.