In fourteen years time, a mother will be twice as old as her son. four years ago the sum of their ages was 30years, find how old the mother was when the son was born

80π/3 or about 83.775

step-by-step explanation:

since a cone is 1/3 of a cylinder, we need to find the base's area. since area = πr^2, we get 16π. then, multiplying this by 5, we get 80π. dividing by 3, since the cone's volume is 1/3 of that of a cylinder's, we get 80π/3.

hope this !

good luck on your studies! : )

david edward.