Question

What will be the cost of gardening 1 m around a rectangular plot having perimeter of 340 m at the rate of rs 10 per square meter?

Answer 1

perimeter = 2(l +b) = 340

Area  of boundary = (l + 2) (b + 2 ) - lb

2(l + b) + 4

340 + 4 = 344              

Cost of gardening = 344 x 10 = 3440