# Perimeter

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• Q1

The side of a square whose perimeter is 100 cm, is

Marks:1

25 cm

##### Explanation:

• Q2

The perimeter of a rectangle is 360 cm and length is 100 cm. Its breadth will be

Marks:1

80 cm

##### Explanation:

Let the breadth = x cm,

Perimeter of rectangle = 2(length + breadth)
360 = 2(100 + x)
360 = 200 + 2x
2x = 360 – 200
2x = 160
x = 80 cm

Hence, breadth of rectangle = 80 cm
• Q3

Pinky runs around a square field of side 75 m and Bobby runs around a rectangular field with length 160 m and breadth 105 m.

How much more distance was covered by Bobby?

Marks:1

230 m

##### Explanation:

Pinky runs around a square field.
side of the square field = 75 m
Distance covered by Pinky = 4 × 75
= 300m
Bobby runs around a rectangular field.
length of the field = 160 m and breadth = 105 m
Distance covered by Bobby = 2×(l + b)
= 2×(160+105)
= 2 × 265
= 530 m
So,
Bobby covered more distance = 530 – 300
= 230m

• Q4

The perimeter of a rectangle whose length and breadth are 25 cm and 15 cm respectively, is

Marks:1

80 cm

##### Explanation:

We know that the perimeter of a rectangle = 2×(length + breadth)

Hence, the perimeter of the given rectangle = 2×(25 + 15) cm

= 2×(40) cm

= 80 cm

• Q5

The perimeter of a regular hexagon with each side measuring 8 m is

Marks:1

48 m

##### Explanation:

Perimeter of a regular hexagon = 6 × (side)

Hence, the perimeter of the given hexagon = 6 × (8) m

= 48 m