Question

The perimeter of a rectangular field is 240 m. If the breadth of the rectangle is 30 m, find its length and also find the cost of cleaning the field at Rs.4 per square metre.​

Answer 1

Step-by-step explanation:

given,

lenght =???

breadth = 30 m.

according to question

the perimeter of rectangle = 2( l + b )

240 = 2 ( l + 30 )

240/2 = ( l + 30 )

120 = l + 30

120 - 30 = l

l = 90 m.

cost of cleaning the field = 240 × 4

=. RS. 960

hope this will help you bro.

Answer 2

Perimeter =(L+B)*2
240/2=120
120-30=90
L90 B30
Area=L*B=90*30=2700*4=10800