Q.22 The length of a parallelogram is 15 cm and it's breadth is 2/5 of
the length. Find it's perimeter?
Answers
Given :-
Length of a parallelogram = 15 cm
Breadth of a parallelogram =
To find :-
Perimeter of the parallelogram
Solution :-
Length is 15 cm, and
Let's find the breadth.
Breadth = 2 × 3
Breadth = 6 cm
Breadth of the parallelogram = 6 cm
Now, we can easily solve for the perimeter of the parallelogram using the formula.
Plug in the values in the above formula,
Perimeter = 2 ( 15 + 6)
Perimeter = 2 ( 21)
Perimeter = 42 cm
•°•Perimeter of the parallelogram is 42 cm
To verify the answer, we will check whether the breadth of the parallelogram will result in 6 cm after input of the value of perimeter in the formula.
Perimeter = 2 ( l + b)
42 = 2 ( 15 + b)
42 = 2 ( 15) + 2 ( b)
42 = 30 + 2b
42 - 30 = 2b
12 = 2b
6 = b
Our answer is hence, right.
42cm
Length=30cm
breadth=2/5*length
=2/5*15
=6cm
Perimeter=2*(length+breadth)
=2*(15+6)
=2*21
=42cm