Question

Q2. The ratio of length and breadth
of a rectangle is 5:2 and it's
perimeter is 63 cm . Find the area of
the rectangle​

Answer 1

Answer:

490sq.cm

Step-by-step explanation:

let the length be 5x and breadth be 2x.

as , perimeter of rectangle is 2(l+b)..

63 =: 2(5x + 2x)

63. =: 9x

63/9 =: x = 7cm

length = 5x = (5*7) =35cm

breadth=2x = (2*7)= 14cm

Therefore, area is (l*b).. = (35*14)sq.cm

= 490sq.cm

Answer 2

Answer:

Let the length = 5x

Let the breadth = 2x

Perimeter of rectangle 2 (L + B)

63 ( 5x + 2x)

63 ( 7x )

x = 63/7

x = 9

Length = 5x = 9 × 5 = 45 cm

Breadth = 2x = 2 × 5 = 10 cm

Area of rectangle = Length × Breadth

45 × 10

= 450 cm²