Question

25.
18. The length and breadth of a
rectangle is in the ratio 5: 4. If its
perimeter is 90 m, then its area
will be : INET & HAZ., 2006-07)
(a) 500 m2 (b) 360 m2
(c) 540 m2 (d) 900 m2​

Answer 1

Answer:

500 m² .

Option. a is correct

Explanation:

Given :

Length and breadth of a  rectangle is in the ratio 5 : 4 .

And its perimeter is 90 m .

Let unit constant be k

Length = 5 k

Breadth = 4 k.

We know : Perimeter of rectangle = 2 ( l + b )

Perimeter of rectangle = 2 ( 5 k + 4 k )

Perimeter is given 90 m

90 = 18 k

k = 5 .

Now , length = 25 m

Breadth = 20 m.

We have to find area :

Area = l × b

Area = 20 × 25 m²

Area = 500 m² .

Hence we get area 500 m² .

Answer 2

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Answer in ATTATCHMENT....