Page 1 - WSA2

SAI INTERNATIONAL SCHOOL

Class VII

Sub: Mathematics

Chapter- 11: Area and Perimeter

Worksheet-2(Answers)

1. (d) 1000000
2
2. (c) 50.24 m
3. We know that, 1 m = 100 cm

1 cm = 10 mm
So, 1 m = 10 × 100

1 m = 1000 mm

2
Then, 1 m = 1000 × 1000
2
1 m = 1000000
4. 10000m 2

2
5. (d) πn
6. From the question it is given that, the largest circle that can be cut out of the rectangle
measuring 10 cm in length and 8 cm in breadth.

Diameter of circle = 8 cm

Then, radius = diameter/2
= 8/2

= 4 cm

7. (c) 3 times
2
We know that, area of the circle = πr
Where, r = radius of original circle

Then, radius is doubled = 2r
2
Then, area of new circle = π(2r)
2
= π4r
Hence, the area will increase by 3 times the area of the original circle.
8. 18πr

2
9. Area of circle = πr
From the question, the radius of a circle is tripled = 3r