There is a cube with a length 3x. The expression for the volume in cubic centimeters is equal to the expression for the surface area in square centimeters. Calculate the length of a side of the cube.

volume = SA (3x)= (3x)2 x 6 27x3 = 9x2 x 6 27x3 = 54x2 27x = 54 27x - 54 = 0 27(x - 2) = 0 x - 2 = 0 x = 2 The question asks for the length which we are told is 3x: length => 3x = 3 x 2 = 6cm.

SD
Answered by Sofia D. Maths tutor

6472 Views

See similar Maths GCSE tutors

Related Maths GCSE answers

All answers ▸

A plane flew from Frankfurt to Hong Kong. The flight time was 10hours 45minutes. The average speed was 852km/h. Work out the distance the plane flew.


Find the values of x and y using the simultaneous equations: x+y=11, y-6=15


When should I use the quadratic formula?


How do I work out the nth term?


We're here to help

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

© MyTutorWeb Ltd 2013–2025

Terms & Conditions|Privacy Policy
Cookie Preferences