17. The volume of water in a pool varies directly with time. Serena takes 3 minutes to fill the first 380 litres of water in the pool.

a) How long should she expect the remaining 1320 L of water to take? Round your answer to one
decimal place, and then express your rounded answer in minutes and seconds (no decimals).

b) Serena only has 13 minutes to spare because she forgot that she's got a real important math test to
write at school the same morning her dad told her to fill the pool. Will she have enough time to fill
the pool completely? Explain your answer.