The diameter of a ring is 19mm. Calculate the area of the ring in cm^2, giving the area to 3 significant figures.

First you must convert the diameter into cm from mm:19/10 = 1.9cmThen you must find the radius of the ring:radius = diameter/2 = 1.9/2 = 0.95 cmThen you can calculate the area:area = 2πr2 = 2 x π x (0.95)2 = 5.67 cm2

Answered by Mary P. Maths tutor

2840 Views

See similar Maths GCSE tutors

Related Maths GCSE answers

All answers ▸

Grade 8/9 question: Point A (0,1) and Point B (10,6) lie on a straight line. Find the equation of the line perpendicular to AB which also intersects B.


How do you rationalize the denominator of a fraction?


Prove that the square of an odd number is always 1 more than a multiple of 4.


what is the Pythagoras theorem?


We're here to help

contact us iconContact usWhatsapp logoMessage us on Whatsapptelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo
Cookie Preferences