Question

A path 1 metre wide is built inside the the square park of side 30mm along its side find the area of the path calculate the cost of constructing the path at the rate of rupees 70 per metre square

Answer 1

Answer:

area of the park=30×30=30^2

after construction of the road, park will be of shape of a square of side 30-1-1=28

area of this square =28×28=28^2

area of path=30^2 - 28^2 = (30+28)(30-28)=

58×2=116sq m

cost of construction=70×116=8120Rs