Simplify 3 sqrt 20 divded by sqrt 5

2 √20 : √5 Multiply both sides by √5 : √5

(3 √20 * √5) : 5 √20 simplifies to 2√5

(3 * 2√5 * √5) : 5 √5 times √5 = 5

(3 * 2 * 5) : 5 the 5 in the numerator/denominator cancel out

3 * 2

6