Answer:
3 × 3 × 3 × 5 × 7
Nw how old is the girl, her mum & her dad?
let x=xmum's age
x+5=dad's age
x/2 =girl's age
x+x+5+x/2=100
3.5x=95
xmum's age=38
dad's age=43
girl's age=19
r^2h and the volume of a Cone is V=1/3