Mensuration

1. The length of a rectangular field is increased by 50% and its breadth is decreased by 50 % to form a new rectangular field. then the change in are of the firld is

2. An athlete takes rounds of a rectangular park, 50 m long and 25 m wide. The total distance covered by him is 1500 m.

3. Perimeter of a rectangle is 2 m whose length and breadth are 150 cm and m respectively.

4. Perimeter of a rectangle = 2 × ().

5. The dimensions of an open box are 50 cm, 40 cm, and 23 cm. Its thickness is cm. If 1 cubic cm of metal used in the box weighs 5gms, then the weight of the box is 8.04kg.

6. Perimeter of a square = × length of a side.

7. Perimeter of an equilateral triangle = × length of a side.

8. The diagonals of a rhombus are 24 cm and 10 cm then the perimeter of rhombus is

9. The area of a parellelogram is 70 cm2 and its altitude is cm.if the perimeter of a rectangle having equal area on the same base of 34cm.

10. Perimeter of this equilateral triangle 3 × 4 cm = cm.

11. The perimeter of a regular pentagon with each side measuring 3 cm is cm.

12. The perimeter of a triangle of sides 3 cm, 4 cm and 5 cm is cm.

13. If the perimeter of Square if 144 cm the its side is equal to cm.

14. Two sides of a triangle are 12 cm and 14 cm. The perimeter of the triangle is 36 cm. then the third side is cm.

15. The amount of surface enclosed by a closed figure is called its

16. The area of the rectangle = 15 sq cm which can be written as × sq cm.

17. A floor is 5 m long and 4 m wide. A square carpet of sides 3 m is laid on the floor. Then m of area of the floor that is not carpeted.

18. The length and breadth of three rectangles are as given below :
(a) 9 m and 6 m (b) 17 m and 3 m (c) 4 m and 14 m
has the largest area and has the smallest.

19. is the distance covered along the boundary forming a closed figure when you go round the figure once.

20. Rs. is the cost of fencing a rectangular park of length 250 m and breadth 175 m at the rate of Rs 12 per metre.

Mensuration

Gap-fill exercise