A tap with a constant flow fills 3.6 litres in 2.4 minutes. How many litres does it fill in 5.8 minutes? Enter the number of litres.
Correct answer
8.7
Explanation
The tap fills 3.6 divided by 2.4, or 1.5 litres per minute, so in 5.8 minutes it fills 8.7 litres. Adding the time increase of 3.4 to the original volume would give 7, but those unlike quantities cannot be added to scale the flow.