Question

the cost of levelling a square lawn at Rs. 15 per square meter is Rs. 19935. Find the cost of fencing the lawn at Rs. 22 per meter

Answer 1

let the side of the square lawn = a m

i)area of the lawn = (cost of levelling the lawn)/(cost of the levelling 1 sq m)

a² = 19935/15
a² =1329 m²
a =√1329
a ≈36.455 m

ii) cost of fencing lawn per 1m = Rs 22
perimeter of the square = 4a
=4*36.455
=145.82 m
iii) cost of fencing the lawn = cost of fencing 1 m * perimeter
= 22* 145.82
= Rs 3208.079

Answer 2

ᗩᘉSᘺᘿᖇ

₹15 = 1 m²

₹19935 = (19935/15) m²

Area of square = 1329 m²

Area of square = 1329 m²

Side of square = √1329 m

Side of square = 36.4 m

Perimeter of square = 4 × Side

Perimeter of square = 4 × 36.4

Perimeter of square = 145.6 m

Cost of fencing 1 m = ₹22

Cost of fencing 145.6 m = ₹(145.6 × 22)

Cost of fencing 145.6 m = ₹3203.2