Level 1
Kira had a string which was 23 m long. She cut them into 6 identical smaller pieces. What was the length of each of the small piece of string? Give your answer in the simplest form.
Level 2
A tap took 12 minutes to fill up a pail with a capacity of 4 ℓ. At the same rate, how long would it take for the tap to fill up 25% of a container with a capacity of 30 ℓ? Express your answer in min.