помогите составить задачу в 4 действия. Тема правильные и неправильные дроби.

Две башни в равнине находятся на расстоянии 60 локтей одна от другой. Высота одной 50 локтей , другой - 40 локтей. между башнями находится колодец , одинаково удаленный от вершин обеих башен.  Как далеко находится колодец от основания каждой башни?

1. A: I ...am seeing... (see) Roger at seven o'clock tonight.
B: Really? I thought he was out of town.
2. A: .........................................................(you/do) anything on Friday morning?
B: No, I'm free.
3. A: I .............................................(go) to the cinema. There's a new film on. Do you want to come with me?
B: What time.................................(the film/start)?
4. A: Helen ...................................(have) a party the day after tomorrow...........................(you/go)?
B: As a matter of fact, I haven't been invited.
5. A: The new exhibition ................................(open) on April 3rd and...............................(finish) on May 31st.
B: I know. I ...............................................................(go) on the first day.
6. A: Aunt Maggie.........................(come) to visit us tomorrow.
B: I know. What time........................(she/arrive)?
7. A: Excuse me, what time....................................... (the train/leave)?
     B: At half past three, madam.
8. A: Michael Jackson..................................(give) a concert at the Olympic Stadium next week.
     B: I know. I .........................(want) to get a ticket.
9. A: I'm really thirsty.
     B: I..............................(get) you a glass of water.
10. A: Are you looking forward to your party?
     B: Yes. I hope everyone.......................  (enjoy) it.
11. A: How old is your sister?
     B: She.............................(be) twelve next month.
12. A: What are you doing tonight?
     B: I .............................................(probably/watch) TV after dinner.