Advertisements
Advertisements
Question
A circular disc has a radius 10 cm. Find the area of the disc in m2 (Use π = 3.14).
Advertisements
Solution
Given radius = 10 cm = 0.1m
π= 3.14
Area of a circular disc A = ?
Formula : Area of a circle A = πr2
= 3.14 × 0.1 × 0.1
Solution : A = 0.0314 m2
APPEARS IN
RELATED QUESTIONS
The area of an irregular lamina is measured by using a ______.
Describe the method in steps to find the area of an irregular lamina using a graph paper.
Write true or false.
The area can be expressed as the product of length of two sides.
Select the correct alternative:
The amount of surface occupied by an object is called its __________.
Explain how you will measure the area of (i) a square (ii) a leaf?
Tick the most appropriate answer.
To measure the volume of an irregular shaped body, we use a
Find the area of these leaves, where 1 square on the graph paper represents 1 cm2.

Solve the following numerical problem.
Grass is to be laid a rectangular field of dimensions 55 m × 45 m. Calculate the area of the field.
Solve the following numerical problem.
A lawn is in the shape of a square. Find the area covered by the lawn if each of its sides is 50 m.
The dimension of a school playground is 800 m × 500 m. Find the area of the ground.
