Question

The cost of levelling a square lawn at rs. 15 per square metre is 19935. Find the cost of fencing the lawn at rs. 22 per metre

Answer 1

Area of lawn = 19935/15 = 1329unit^2
Side of square √1329= 36.45units
Perimeter of square= 36.45x4= 145.8units
Cost of fencing = perimeter x price = 22x145.8 = 3207.6

Answer 2

Solution :-

Total cost of leveling a square lawn at the rate of Rs. 15 per square meter = Rs. 19935

So, area of the square lawn = Total cost/Cost per square meter
= 19935/15
Area of the square lawn = 1329 sq m

Area of square = Side*Side
So, each side of square lawn = √1329

Each side of square lawn = 36.45 m

Now, 
Perimeter of the square lawn = 4*Side
= 4*36.45
Perimeter of the square lawn = 145.8 m

Cost of fencing the square lawn = 22 per meter

Total cost of fencing the square lawn = 145.8*22
Total cost of fencing = Rs . 3207.6

Answer.