Question

find the perimeter of a rectangular hall 30m long if length of the hall is double it's breadth?​

Answer 1

Given:

Length of the rectangular hall is 30 m.

Breadth of the rectangular hall = Length / 2 = 30/2 = 15 m.

To Find:

The perimeter of the rectangular hall.

Formula:

Perimeter of a rectangle = 2 ( Length + Breadth )

Solution:

Perimeter of the rectangle = 2 ( 30 + 15 ) m

Perimeter of the rectangle = 2 ( 45 ) m

Perimeter of he rectangle = 90 m

Answer:

The perimeter of the rectangular hall is 90 m.

Answer 2

Answer:

According to the questions

Length of the hall is double of it's breadth

so, 30m ÷ 2 = 15m

Length = 30m

Breadth = 15m

Perimeter of the Rectangle = 2(length+breadth)

= 2(30m + 15m)

= 2(45)m = 2×45m

= 90m

Hence, the perimeter of the rectangular hall is 90m.