Question

Here is a cuboid.

Jackie tries to work out the volume of this cuboid.
Here is her working.

10 + 20 + 5 = 35cm

She has made two errors. What are her errors?

Answer 1

first : she has added the 3 values instead of multiplying them.

second:volume is always written in cubics

Answer 2

trying to add the dimensions instead of multiplying and using cm instead of cm^3