Question

8.
f. Find the cost of levelling a square field of side
20 m at the rate of 12 per sq. m.
A wire is in the shape of a rectangle of length
30 cm and breadth 5 cm. It is cut and bent to
form another rectangle of breadth 10 cm. Find
the length and area of the new rectangle.​

Answer 1

Answer:

Given A wire is in shape of rectangle

where

length=20 cm.

breadth=12 cm.

Perimeter of rectangle =2(l+b)

=2(32)

[Perimeter =64 cm.]

now of wire is bent in shape of square

where side =a cm

now

Perimeter of rectangle = perimeter of square

64=4a

[a=16cm]

side of square formed is 16 cm.