Question

the area of rectangle is 105 square CM if its length is 21 cm find its perimeter​

Answer 1

here is ur answer.............

area=105

l=21

area =l(b)

105=21(b)

b=105/21

b=5

hope my ans may help u

Answer 2

Answer:

Here is your answer...............

Second method :-

Area of rectangle = l(b)

L=21

21(b) =105

B=105/2

B=5