Question 774815
The hole is 4*100 = 400 cm's in length
A)  15*4 = 60 cm is the length of the snake
B)  after the 15 seconds the head of the snake is 340cm from the exit
    so 340/4 seconds for the head of the snake to reach the exit and
    another 15 seconds to exit
    340/4 + 15 = 85 + 15 = 100 seconds to exit