Question

8. Find the missing sides of the following
rectangles.
A. Area = 20 cm, L = 10 cm
B. Area = 46 cm, L = 23 cm
-C. Area = 40 cm, B = 4 cm
D. Area = 30 cm, B = 4 cm
E. Area = 56 m, B = 700 cm
F. Areq = 42 m, L = 2,000 cm​

Answer 1

Step-by-step explanation:

A. Given : Area = 20 cm. and Length : 10cm.

let Breadth = b

Area of rectangle = l×b

20 cm. = 10 × b

b= 20/10 cm.

b= 2 cm.

B. Given : Area = 46 cm. and Length : 23cm.

let Breadth = b

Area of rectangle = l×b

46 cm. = 23× b

b= 46/23

b= 2 cm.

C. Given : Area = 40 cm. and Breadth: 4cm.

let length = l

Area of rectangle = l×b

40cm. : l× 4

l= 40/4

l= 10 cm.

D. Given : Area = 30 cm. and breadth : 4cm.

let length = l

Area of rectangle = l×b

30cm. : l× 4

l= 30/4

l= 7.5 cm.

E. Given : Area =56 m. and breadth : 700cm.

56 m= 5600cm

let length = l

Area of rectangle = l×b

5600cm. : l× 700

l= 5600/700

l= 8 cm.

F. Given : Area = 42m and Length : 2000cm.

42m= 4200cm.

let Breadth = b

Area of rectangle = l×b

4200cm. : 2000 × l

l= 4200/2000

l= 2.1