Question

What is the perimeter of a rectangle whose length is twice its breadth and the breadth is 7 cm?

Answer 1

Given,

Breadth = 7cm

length of rectangle = 2 × breadth

= 2×7

=14cm

Perimeter of rectangle:

= 2(length+breadth)

= 2(14+7)

= 2 × 21

= 42cm

Thus, the perimeter of a rectangle, whose length is 14cm and breadth is 7cm, will 42cm.

Answer 2

Answer:

PERIMETER=2×(Length+Breadth)

Here

Length is twice of breath (given)

breadth=7cm

length=2×7=14

Step-by-step explanation:

therefore

PERIMETER=2×(length+breadth)

P=2×(7+14)

P=2×21

P=42cm

therefore PERIMETER=42cm