Evaluate [r]; i.e., the units of r, in the expression

Question

r =v (s - a) (s - b) (s - c)/s where s =.5 (a + b + c) , and a, b, and c have
units of meters.
1. [r] =1/m^1/3
2. [r] = m^1/2
3. [r] = m
4. [r] = m^2
5. [r] = m^1/3
6. [r] =1/m^2
7. [r] = m^3
8. [r] =1/m^1/2
9. [r] =1/m

Answer 1

3.
s=m and m^3/m is m^2.
the square root will be m.