5/100's tortoise's life was spent above ground.
109.8
you take 240 and subtract that from 2/5.Then you subtract 20 and that gives you 219.6.Since they have the same amount of marbles left,you have to divide 219.6 by 2 and your answer is 109.8
(I just used a calculator)
Answer:
2.5 hours
Step-by-step explanation:
it takes him 2.5 hours