Question

Find the perimeter of a rectangle in cm whose length and width are 50 decimetre and 30 decimetres, respectively.
1. 160 cm
2. 1600 cm
3. 16 cm
4. 1.6 cm

Answer 1

Correct Answer - Option 2 : 1600 cm

Given:

Length = 50 decimetre

Width = 30 decimetre

Formula used:

The perimeter of a rectangle = 2(length + width)

1 decimetre = 10 cm

Calculations:

⇒ The perimeter of a rectangle = 2(50 + 30)

⇒ 2 × 80

⇒ 160 dm 

⇒ 1600 decimetre

∴ The perimeter of a rectangle is 1600 cm.