A solid box with height 20cm, width 20cm and length 60cm needs to be painted. The paint costs £0.16 per cm2.
How much will it cost to paint the outside of the box?

It takes £896

Step-by-step explanation:

We need to find the surface area of a rectangle.

To find:

2×(60×20 + 60×20 + 20×20)

This equals 5600 cm^2

Now find the cost:

0.16 x 5600 = £896

The answer is 896

step-by-step explanation:

1. practice, practice & more practice

2. review errors

3. master the key concepts

do not try to memorise the processes.

4. understand your doubts.

5. create a distraction free study environment

6. create a mathematical dictionary

7. apply maths to real world problems.