MYTUTOR SUBJECT ANSWERS

132 views

The area of a circle is 16π cm squared. Find the diameter of the circle.

We can calculate the area of a circle using the following formula:

A = pi x r2

The area we are given is 16pi. Therefore, we can divide both sides by pi. So,

16pi = pi x r2

becomes

16 = r2

We can squareroot both sides to calculate the value of r. 

sqrt16 = sqrt r2

Therefore r = 4

We can then use the formula d = 2r to calculate the diameter. 

Therefore the diameter of the circle is 2x4 = 8cm. 

Melissa P. GCSE Maths tutor, 13 plus  Maths tutor, 11 Plus Maths tuto...

3 months ago

Answered by Melissa, a 13 Plus Maths tutor with MyTutor

Still stuck? Get one-to-one help from a personally interviewed subject specialist

117 SUBJECT SPECIALISTS

£18 /hr

Raimonds B.

Degree: Architecture (Bachelors) - Bath University

Subjects offered: Maths, Physics

Maths
Physics

“I am a first year Architecture student, as well as a well experienced tutor. I have tutored GCSE and A Level Mathematics and Physics for over two years, and have 5 star reviews on First Tutors. I have an exam based approach to revision...”

MyTutor guarantee

£18 /hr

George I.

Degree: Electrical and Electronic Engineering (Masters) - Bristol University

Subjects offered: Maths, Further Mathematics

Maths
Further Mathematics

“About Me: I am currently a third year Electrical and Electronic engineering undergraduate at the University of Bristol. I have always enjoyed taking mathematics and further mathematics as I look forward to tackling problems with nume...”

MyTutor guarantee

£18 /hr

Nicola C.

Degree: Medicine MBChB (Other) - Birmingham University

Subjects offered: Maths, Chemistry+ 2 more

Maths
Chemistry
Biology
-Medical School Preparation-

“About me I have an incredible passion for science and am currently studying Medicine at the University of Birmingham. Having always shown great enthusiasm for the science subjects, I hope that I would be able to pass this on to other ...”

About the author

£18 /hr

Melissa P.

Degree: Mathematics (Bachelors) - Birmingham University

Subjects offered: Maths, Spanish

Maths
Spanish

“About me:  I am currently studying for a Maths degree at the University of Birmingham. I have enjoyed Maths since I was very young and hope I can pass some of this on to you!  I am very friendly. I have been coaching gymnastics since...”

You may also like...

Posts by Melissa

Factorise fully 3*a^3*b +12*a^2*b^2 + 9*a^5*b^3

Find the 100th term in the sequence 3, 7, 11, 15...

Find the highest common factor of 432 and 522

Find the next three terms of the sequence 17, 14.5, 12, 9.5

Other 13 Plus Maths questions

Find the value of 0.3 × 0.2

Factorize 9x+3xy-9zyx

The price of a TV is reduced in a sale by 30%. If the sale price is £280 what was the original price?

is your child lost in math ?

View 13 Plus Maths tutors

Cookies:

We use cookies to improve our service. By continuing to use this website, we'll assume that you're OK with this. Dismiss

mtw:mercury1:status:ok