Page 147 - Maths Class 06

(c) length = 185 m; breadth = 80 m

(d) length = 10 m 25 cm; breadth = 5 m 75 cm
3. Find the perim eter of a square with one side as:
(a) 15 cm (b) 24 cm (c) 195 cm (d) 1 m 25 cm
4. Determine the perimeter of a triangle whose sides are:
(a) 4 cm, 3 cm, 6 cm (b) 15 cm, 12 cm, 7 cm

(c) 25 cm, 26 cm, 27 cm (d) 15 cm, 20 cm, 25 cm
5. The top of a rect an gu lar box of sides 75 cm by 25 cm needs to be sealed all round with a tape.
What is the length of the tape required?

6. Find the cost of putt ing a fence around a rect an gu lar park of length 50 m and breadth 30 m at the
rate of ` 50 per metre.
7. Find the cost of fenc ing three sides of a square garden having side as 25 m at the rate of ` 10 per
metre.
8. The length and breadth of a rect an gu lar play ground is in the ratio of 4 : 1. The cost of fenc ing the
play ground at the rate of ` 50 per metre is ` 5000. Find the dimen sions of the playground.

9. Lalit runs twice around a square park with side 80 m, whereas Rohan runs thrice around a rect an -
gular park with length 100 m and breadth 75 m. Who covers less distance?
10. Find the length of a rect angular playground having perim eter 600 m and breadth 90 m.

11. The ratio of length to breadth of a rect an gu lar field is 2 : 1. A man runs 5 times around this field
and covers the distance of 2 km. Find the length and breadth of the field.
12. Mayank walks around a rect angular park of length 60 m and breadth 40 m and Roma walks
around a square park of side 55 m. Both take 3 rounds each. Who walks more distance and by how
much?
13. An athlete takes 12 rounds of a rectangular park 150 m long and 100 m wide. Find the total
distance covered by him.

14. A rect an gu lar piece of plot measures 0.6 km by 0.5 km. Each side is to be fenced with 5 rows of
wires. What is the length of the wire needed? If the wires costs ` 9 per metre, what will be the cost
of the wire required for fencing?

Area
Consider the following rectangles:
1 cm

7 cm 2 cm 3 cm

6 cm
5 cm
Each of the above rectangles have perimeter as 16 cm then, why is it that they look so different?
The region they occupy, makes them look so different. The region that they occupy is called area.

Area is defined as the region enclosed by a plane closed figure. The unit to measure area is sq. m. or sq.
2
2
cm. written as m or cm respectively.
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