Note that the chances of a head and a tail appear in a single toss is 1/2
(1/2)^3 =0.125
He saved 5/24 of his money
Make common denominators
1/6 * 4/4 =4/24
5/8 * 3/3= 15/24
15/24 + 4/24 = 19/24
24/24 - 19/24
= 5/24
Just divide 948.6 m^3 by 3.1 m and 5.1 m to get 60 m