Question

7. Find the cost of fencing a rectangular lawn at 3.50 per metre, if its area is 2160 m and the sides are in the ratio of 5:3 ​

Answer 1

Answer:

let the length= 5x

let the breadth=3x

area=2160

Step-by-step explanation:

ATQ

area of rectangle= l × b

2160= 5x × 3x

2160= 15x²

2160/15= x²

144= x²

√144= x

x = 12m

5x= 5×12

= 60

3x= 3×12

= 36

Hence, the sides of rectangular lawn 60m and 36m