Have a query? Ask a Tutor!!

Access to best educators and exclusive paper discussions

Can’t find what you’re looking for?

Our tutors are from top schools around the world, and they are waiting for you 24/7, anytime, anywhere.

Homework- One to One Solutions
Understand concepts to solve better
Get your doubts solved instantly

Maths-

General

Easy

Question

Find the area and circumference of the dollar coin

hint Hint:

Given the diameter of the circle .Find the radius of circle then Find the circumference of the circle by using the formulas circumference of circle $equals 2 pi r$ and area of circle = $2 pi r$ .

The correct answer is: The circumference of a circle is 9.4247 cm and the area of the circle is 7.0685 sq.cm

ANS :- The circumference of a circle is 9.4247 cm and the area of the circle is 7.0685 sq.cm.
Explanation :-
Given, the diameter of circle = 2r = 3 cm
Then the radius of circle r = 1.5 cm
Then we get circumference of circle $equals 2 pi r$
$equals 2 pi left parenthesis 1.5 right parenthesis$
$equals 3 pi cm$ = 9.4247 cm
The circumference of a circle is 9.4247 cm
Then we get area of circle = $pi r squared$
$equals pi left parenthesis 1.5 right parenthesis squared$
$equals 2.25 pi cm squared$
= 7.0685 sq.cm
The area of the circle is 7.0685 sq.cm.
∴The circumference of a circle is 9.4247 cm and the area of the circle is 7.0685 sq.cm.

Related Questions to study

The diameter of a circle is 10 m. Find the area of the circle.

The diameter of a circle is 10 m. Find the area of the circle.

A Solid is in the form of a cylinder with hemispherical ends. The total height of solid is 19 cm and the diameter of the cylinder is 7 cm , Find the volume of the solid ?

A Solid is in the form of a cylinder with hemispherical ends. The total height of solid is 19 cm and the diameter of the cylinder is 7 cm , Find the volume of the solid ?

The circumference of a circle is 28.3 cm. Find its radius and area.

The circumference of a circle is 28.3 cm. Find its radius and area.

parallel

A Sphere of diameter 6 cm is dropped into a right circular cylindrical vessel partly filled with water. The diameter of cylindrical vessel is 12 cm. If the sphere is completely submerged in water , by how much will the level of water rise In the cylindrical vessel ?

A Sphere of diameter 6 cm is dropped into a right circular cylindrical vessel partly filled with water. The diameter of cylindrical vessel is 12 cm. If the sphere is completely submerged in water , by how much will the level of water rise In the cylindrical vessel ?

The area of a circle is 153.86 m2. Find its radius. Use π = 3.14.

The area of a circle is 153.86 m2. Find its radius. Use π = 3.14.

The Surface area of a solid sphere is 1256 sq.cm .It is cut into hemispheres. calculate the volume of a hemisphere

The Surface area of a solid sphere is 1256 sq.cm .It is cut into hemispheres. calculate the volume of a hemisphere

parallel

What kind of geometric intersections does the given image represent?

What kind of geometric intersections does the given image represent?

The boundary of a circle is 56.52 metres long. Find its radius.

The boundary of a circle is 56.52 metres long. Find its radius.

A Solid consisting of a right circular cone , standing on a hemisphere , is placed upright , in a right circular cylinder , full of water and touches the bottom. Find the volume of the water left in the cylinder having given that the radius of the cylinder is 3 cm and its height is 6 cm, the radius of hemisphere is 2 cm and the height of the cone is 4 cm.Give your answer to the nearest cubic centimetre .

A Solid consisting of a right circular cone , standing on a hemisphere , is placed upright , in a right circular cylinder , full of water and touches the bottom. Find the volume of the water left in the cylinder having given that the radius of the cylinder is 3 cm and its height is 6 cm, the radius of hemisphere is 2 cm and the height of the cone is 4 cm.Give your answer to the nearest cubic centimetre .

parallel

The graph of inequality x ≥ −3 or x ≤ 4 plotted on a number line represents a ____.

The graph of inequality x ≥ −3 or x ≤ 4 plotted on a number line represents a ____.

A circular window has a radius of 17 m. Find its circumference and area.

A circular window has a radius of 17 m. Find its circumference and area.

A hemisphere , cylinder and a cone have equal base diameters and have the same height. Prove that their volumes are in the ratio 2:3:1

A hemisphere , cylinder and a cone have equal base diameters and have the same height. Prove that their volumes are in the ratio 2:3:1

parallel

A solid is in the form of a right circular cylinder with hemisphere at one end and a cone at the other end. Their common diameter is 3.5 cm and the height of the cylindrical and conical portions are 10 cm and 6 cm respectively .Find the volume of the solid ?

A solid is in the form of a right circular cylinder with hemisphere at one end and a cone at the other end. Their common diameter is 3.5 cm and the height of the cylindrical and conical portions are 10 cm and 6 cm respectively .Find the volume of the solid ?

Find the circumference of a circle with radius 16 m

Find the circumference of a circle with radius 16 m

The graph of inequality x ≤ 6 plotted on a number line represents a ____.

The graph of inequality x ≤ 6 plotted on a number line represents a ____.

parallel

card img

With Turito Academy.

card img

With Turito Foundation.

card img

Get an Expert Advice From Turito.

Turito Academy

card img

With Turito Academy.

Test Prep

card img

With Turito Foundation.