◄Previous: 1.3.3 Drawing a pie chart

# Try some yourself

## Question 1

A company carried out a survey, recording how staff in a particular office spent their working time. The table shows the average number of minutes spent in each hour on various activities.

##

Activity | Time taken on average in one hour/mins
--- | ---
Keyboarding | 35
Answering telephone | 12
Talking with colleagues | 10
Other | 3

The data is to be displayed as a pie chart. Work out the angle at the centre for each slice.

### Answer

Since one hour will be represented by 360° on the pie chart, 1 minute will be represented by 360° ÷ 60 = 6°.

So the required angles on the chart are:

## How office staff spend their time (Source: Company survey)

Keyboarding | 35 × 6° = 210°
Answering telephone | 12 × 6° = 72°
Talking with colleagues | 10 × 6° = 60°
Other activities | 3 × 6° = 18°

Check: 210° + 72° + 60° + 18° = 360°.

◄Contents►Next: 1.3.4 Vertically opposite angles

OpenLearn - Geometry
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