Question

(a) 10 cm 16. The perimeter of a rectangle is 130 m. If the breadth of the rectangle is 30 m, find us arca, (a) 640 m2 (b) 600 m2 (0) 700 m (d) none of these 17. The sides of a rectangle are in the ratio 5:4. If its perimeter is 72 em then the length is (a) 20 cm (b) 30 cm (c) 40 cm (d) none of these 18. The cost of putting a fence around a square field at 2.50 per metre is? 200. The length of each side of the field is (b) 20 m (C) 80 m (a) 40 m (d) none of these 19. The area of a rectangle is 650 cm? and one of its sides is 13 cm. Find the perimeter of the rectangle (a) 120 cm (b) 130 cm (c) 126 cm (d) none of these 1. A room is 5m 40cm long and 3m 75cm wide. Find the area of the carpet needed to cover the floor. (a) 20 m2 (b) 20.25 m2 (c)21 m2 (d) none of these Sipputuro Parent's Suprature 40​

Answer 1

Step-by-step explanation:

16.

Let Length and Breadth of the Rectangle are l and b respectively.

Given that,

b=30m

Perimeter of the Rectangle=130

=>2(l+b)=130

=>l+b=65

=>l+30=65

=>l=65-30=35

Area of Rectangle= Length×Breadth

=30×35=1050m²

17.

Let Length and Breadth of the Rectangle are l and b respectively.

Given that l:b=5:4=>l=5x, b=4x

Perimeter of the Rectangle=72

=>2(l+b)=72=>5x+4x=36=>9x=36=>x=4

Length=5x=5×4=20

Breadth=4x=4×4=16

18.

Let Length of Square=x

Perimeter of Square=4x

According to the Question ,

4x (2.50)=200

=>4x×250/100=200

=>4x=(200×100)/250=80

=>x=20

19.

Let Length and Breadth of the Rectangle are l and b respectively.

According to the Question

b=13

Area of the Rectangle=650

=> l×b=650

=>l×13=650

=>l=650/13=50

Perimeter of the Rectangle=2(l+b)

=2(50+13)=2(63)=126

20.

Length and breadth of the Room are l and b respectively.

Given that

l=5m40cm=(500+40)cm=540cm

b=3m75cm=(300+75)cm=375cm

Area= l×b=(540×375)m²=18900cm²=189m²