# CBSE Class 6 Mathematics/Mensuration/Extra Questions for PracticeModel Questions/ Perimeter & Area Worksheet for Class 6 Maths

Fill in the blanks:

1. The perimeter of a square is 40cm. The length of each side of the square is ————-
2. The side of a square with area 49 square cm is ————-
3. The perimeter of an equilateral triangle of side 7 cm is ————-
4. Perimeter of a regular septagon is 98 cm; its side will be ———-
5. What do you call a four sided polygon?

1. The area of a rectangle is 120 square cm. If its length is 20 cm, find its breadth?
Length = 20 cm (given)
Breadth = Area/Length = 120/20 = 6 cm
2. Manu has a rectangular garden of length 42m and width 30m. How much fencing will he need to enclose the garden?
Perimeter = 2 x (l + b) = 2 x (42 + 30) = 2 x 72 = 144m
3. Find the cost of fencing a rectangular park of length 150m and breadth 100m at the rate of 25 rupees per metre.
Answer: Perimeter = 2 x (l + b) = 2 x (150 + 100) = 2 x 250 = 500m
Cost of fencing = 500 x 25 = 12500 rupees.
4. A floor is 5m long and 4m wide. A square carpet of side 3m is laid on the floor. Find the area of the floor that is not carpeted?
Answer: Area of the floor = l x b = 5 x 4 = 20 sq.m
Area of the square carpet = side x side = 3 x 3 = 9 sq ma
Area of the floor that is not carpeted = 20 – 9 = 11 sq. m
5. The area of a rectangular piece of cardboard is 45 sq. cm and its length is 9 cm. What is the width of the card board?
Answer: Width = Area/length = 45/9 = 5cm
6. Find the cost of fencing a square park of side 250m at the rate of 20 rupees per metre?
Answer: Perimeter = 4 x side = 4 x 250 = 1000m
Cost of fencing = 1000 x 20 = 20000 rupees
7. Two sides of a triangle are 15cm and 25cm respectively. If perimeter of a triangle is 50cm find the third side?
Answer: Length of third side = 50 – (15 + 25) = 50 – 40 = 10 cm
8. Perimeter of a square is 20m. Find its area?