Can you solve the maths in the below-given picture equation?

I am a type of room you cannot enter or leave. Raised from the ground below, I could be poisonous or a delicious treat. What am I?

How many cubic feet of dirt are in a hole of one foot deep, three feet long, and two feet wide?

An express train takes 3 seconds to enter the tunnel which is 1 km long.
If it is travelling at 120 km an hour, how long will it take to pass completely through the tunnel?

Below rebus represent famous DiCaprio movie. Can you name it?

In the figure that has been attached to this question, each digit represents a digit. The similar letters carry the same integer value. Can you expose the original digits?

A bag contains 64 balls of eight different colours. There are eight of each colour (including red). What is the least number you would have to pick, without looking, to be sure of selecting 3 red balls?

By what process could you make a 'Tea-Table' into food?

How many letters are in the alphabet?

What's the only room from which no one can enter or leave