What does this Rebus Picture mean?

Replace the question mark with the correct number.

An ape is trying to climb on a pole that is 60 feet high. Due to the slippery surface, the ape climbs 3 feet in a minute only to slip back 2 feet.

How much time do you think the monkey will take to reach the top of the pole?

What number should come in place of the question mark below?

What has to be broken before you can use it?

I come in different shapes and sizes.
Parts of me are curved, other parts are straight.
You can put me anywhere you like,
but there is only one right place for me.
What am I?

John was a very careless driver, so his owner Jacob gave him an offer that he will get an incentive of Rs.30 for every bottle box he delivered without breaking it and he will be charged Rs.90 for every bottle box he broke. Jacob gave John 100 bottles-box to deliver. After delivery, Jacob paid John Rs.2400. How many bottles-box did John break?

John enters a small room. The Door Closes.
When the door opens, John is in a larger room.

Explain?

You bought me for dinner but never eat me. What am I?

Can you name any English verb that becomes its past tense by simply rearranging the alphabets ?