Okay. Let's get started. The first person to solve the word problem below will get an upvote worth $0.4. There will also be some consolation upvotes for some of the late comers.
How To Participate:
Kindly UPVOTE this post and then answer the question which follows in the comment section. Entries that do not comply with this simple rule will be disregarded.
Question:
John has 3 taps in his bath. If he only fully opens tap 1 it takes 10 minutes to fill the bath. If he only fully opens tap 2 it takes 15 minutes to fill the bath, and if he only fully opens tap 3 it takes 30 minutes to fill the bath. If John were to fully open all 3 taps how long would it take to fill the bath?
Deadline
The test comes to an end once a winner emerges or at the expiration of this post. Good luck guys.