The diagrams show the position of a tap when off and fully on.
When fully on, water flows out of the tap
at 15 litres per minute.
The rate at which water flows out is in direct proportion
to the angle of turn.
The tap is turned 123⁰
123%
The water flows into a tank with a capacity of 90.2 litres.
How long, in minutes, will it take to fill the tank?
Off
180°
Fully on