Question

(c) A teacher decided to put up a new blackboard in her classroom. The length and breadth of the board are l cm and b cm, respectively, )
I She decided to frame the board using a thick nibbon. If she needs 25 cm more ribbon than the perimeter of the blackboard, express the total ribbon length needed in terms of l and b
2 () What will be the expenditure for making 50 such boards, if the carpenter charges Re per board?​

Answer 1

Answer:

l*b

Step-by-step explanation:

2(l+b)

2* lb

2lb