Mensuration
Full Marks- 30 Time-40min
1. A wire is bent to form a square of side 22 cm. If the wire is rebent to 2
form a circle, find its radius
2.Area of a rectangle and the area of a circle are equal. If the 3
dimensions of the rectangle are 14cm × 11 cm, then radius of the circle
is 3.Length of tape required to cover the edges of a semicircular disc of
radius 10 cm is
3.A wall of a room is of dimensions 5 m × 4 m. It has a window of 3
dimensions 1.5 m × 1m and a door of dimensions 2.25 m × 1m. Find
the area of the wall which is to be painted
4. Area of an isosceles triangle is 48 cm2. If the altitudes 2
corresponding to the base of the triangle is 8 cm, find the perimeter of
the triangle.
5.A circle of radius 5 cm is cut from circle of radius 6 cm find the 2
remaining area
6.A circular park has a diameter of 66 cm , if there is a 4 cm path all 2
around it find the area of path
7.The area of a square and a rectangle are equal. If the side of the 3
square is
40 cm and the breadth of the rectangle is 25 cm, find the length of the
rectangle. Also, find the perimeter of the rectangle
8. The circumference of a circle is 31.4 cm. Find the radius and the 2
area of the circle?
9. How many times a wheel of radius 28 cm must rotate to go 352 m? 1
10.Two cross roads, each of width 5 m, run at right angles through the 3
center of a rectangular park of length 70 m and breadth 45 m and
parallel to its sides. Find the area of the roads. Also find the cost of
constructing the roads at the rate of Rs 105 per m2
11.A path 1 m wide is built along the border and inside a square garden 1+2
of side 30 m. Find:
(i) the area of the path
(ii) the cost of planting grass in the remaining portion of the garden at
the rate of Rs 40 per m2.
12. A picture is painted on a cardboard 8 cm long and 5 cm wide such 1
that there is a margin of 1.5 cm along each of its sides. Find the total
area of the margin.
13. A room is 4.5 m long and 4 m wide. The floor of the room is to be 1
covered with tiles of size 15 cm by 10 cm. Find the cost of covering the
floor with tiles at the rate of ` 4.50 per tile.
14. Find the total cost of wooden fencing around a circular garden of 1
diameter 28 m, if 1m of fencing costs ` 300
15. How much distance, in meters, a wheel of 25 cm radius will cover 1
if it rotates 350 times?
Total Marks 30