Question

find the length if Breadth is 20.5 and perimeter is 102​

Answer 1

Answer:

Breadth of rectangle=20.5

perimeter of rectangle=102

Formula:-Perimeter of rectangle=2(l+b)

102=2(l+20.5)

102=2l+41

102-41=2l

61=2l

61/2=l

30.5=l Ans.

Answer 2

Answer:

Substitute the value of breadth and perimeter in formula.

Perimeter of a rectangle is 2 (l+b)

Given: b=20, perimeter=102

2 (l+b)=102

2 (20.5+L)=102

20.5+L= 102/2

L=51-20.5

=30.5cm

Step-by-step explanation:

Remember that when a value isn't given, substitute given values.