Question

the diagonal of a rectangle is 17cm and its perimeter is 46cm, the area of rectangle is

2 points

100 sq.cm

110 sq.cm

120 sq.cm

240 sq.cm

​

Answer 1

Answer:

Answer: B) 120

Explanation:

let length = x and breadth = y then

2(x+y) = 46 => x+y = 23

x²+y² = 17² = 289

now (x+y)² = 23²

=> x²+y²+2xy= 529

=> 289+ 2xy = 529

=> xy = 120

area = xy = 120 sq.cm