How do you simplify 4 square root of 125?

##20sqrt5##

Question: Simplify ##4sqrt125##

##4sqrt125 = 4sqrt(25xx5)## -------------- ##sqrt(axxb)##

##= 4(sqrt25)(sqrt5)## ---------- ##sqrt(axxb) = sqrta xx sqrtb##

##= 4(5)(sqrt5)##

##= 20sqrt5##

##:. Ans: 20sqrt5##