Exercise 8a
Estimating
(You'll be pleased to know that this is the last exercise. Will you qualify to become an inspector?)
When you are an inspector, there will be many
occasions when you will need to measure things. In this exercise
we will find out if you are any good at using the quick method of
estimating lengths and heights.
Look at the building in the picture. Measuring the height would
not be easy without a ladder and a long tape measure. Even then,
it wouldn't be easy for one person, especially if the wind kept
blowing your tape away.
The walls of the building are made of boards. If you measure the
height of one board and multiply it by the number of boards, you
will know how high the building is. Well, almost. There is a
canopy at the front which makes the building a bit taller, but we
won't bother about that.
The back wall of the building has 12 boards. Each board is 17cm high.
Question: How high is the back of the building?
Answer: | 194cm | 204cm | 240cm |