What is full of holes but still holds water?

Question

A fire engine travels seven miles to a fire at a speed of 40 mph.

Its tank holds 500 gallons of water but has been leaking at a rate of 22.5 gallons per hour throughout the journey.

If the fine engine needs 497 gallons of water to put out the fire, will it have sufficient?

Answer 1

A sponge can hold water in spite of the holes it has.