Page 184 - Ganit Kaushal

Subjective/Competency Based Questions

9. Find the perimeter of the shape in the figure given alongside. 1 cm 4 cm 1 cm
3 cm
4 cm 2 cm 3 cm 2 cm 3 cm
3 cm

3 cm 2 cm
3 cm 2 cm 4 cm
1 cm 3 cm 3 cm
4 cm 1 cm
10. Four square flower beds, each of side 4 m, are in four corners on a piece of land 12 m long and 10 m
wide. Find the area of the remaining part of the land. (NCERT)
11. Using the Conventional Rules (C1–C4), find the area of the
shapes in the given pictures (a), (b) and (c) alongside.

(a) (b) (c)
12. The adjoining figure is divided into a square A and two rectangles, B and C. 6 m
A
(a) What is the area of square A?
B 4 m
(b) What is the length of rectangle B? 21 m 10 m
(c) What is the breadth of rectangle C? C
(d) What is the area of the complete figure?

13. A rectangular coconut grove is 100 m long and 50 m wide. If each coconut tree 23 m
requires 25 sq m, what is the maximum number of trees that can be planted in this grove? (NCERT)
14. In each figure, find the missing value of either the length of a side or the area of a region. (NCERT)

(a) (b) 3 cm
13 sq. cm 26 sq. cm ? sq. cm
10 sq. cm

15 sq. cm ? sq. cm 3 cm 2 cm

2 cm 10 sq. cm

? cm
(c) ? sq. cm (d)
3 cm
4 cm
15 cm 42 sq. cm 6 cm 38 sq. cm 5 cm

5 cm
18 sq. cm
60 sq. cm

15. The area of a rectangular garden that is 50 m long is 1000 sq m. Find the width of the garden. (NCERT)
16. Four flower beds having sides 2 m long and 1 m wide are dug at the four corners of a garden that is
15 m long and 12 m wide. How much area is now available for laying down a lawn? (NCERT)

182 Mathematics-6