Page 164 - Maths Class 04

8. Mohit has a swimming pool that measures 20 m by 12 m. He wants to place a

fence around the pool and leave 5 m between the fence to make a deck area.
How much fencing will be needed ?

9. Find the perimeter of a rectangle whose length is 25 m and breadth is 18 m.

1. Tick ( ) the correct option.3

a. A room was 30 m long and 24 m broad. Find the perimeter of the room.
i. 52 m ii. 6 m iii. 108 m iv. 72 m

b. The area can be expressed in units of :
i. sq mm ii. sq cm iii. sq m iv. All of these

c. The perimeter of a triangle is :
i. AB + BC + CA ii. 4 × one side

iii. 2 (AB + BC) iv. None of these
d. The amount of surface, a plane closed figure covers, is called its :

i. perimeter ii. radius iii. circumference iv. area

2. Find the perimeter.
1 cm
a. b.
2 cm 1 cm 2 cm
2 cm

1 cm

2 cm
4 cm 4 cm

6 cm

4 cm

3. Find the area of these designs.

a. b. c.

Mathematics-4 164