Question

4. A rectangular plot has its length 40 m and
(i) Calculate its perimeter.
breadth 15 m.
(ii) A square plot has the same perimeter as
this rectangular plot. What is the length
of its side?
(ii) Calculate the cost of fencing the plot at
30 per metre​

Answer 1

Step-by-step explanation:

(i) perimeter = 2x(L+B)

= perimeter = 2x(40+15)

= perimeter= 2 x 55

= perimeter = 110

(ii) perimeter of 1st question is= 110

same as square = 110

= perimeter of square = 110

sides of

Answer 2

Step-by-step explanation:

L = 40m

B = 15m

A = 2( L + B )

Area = 2 ( 40 + 15 )

Area = 2 X 55

∴ The perimeter of the rectangular plot is 110 m

ii. Find the length of a side of a square plot with the same perimeter

P = 4 X Side

∴ Side = P / 4

Side = 110 / 4

Side = 27.5 m

iii. Find the cost of fencing the plot at Rs. 30 per meter

Cost = 30 X 27.5

∴ Cost = Rs. 825

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