Answer
$31\; pounds$.
Work Step by Step
$\Rightarrow M=kE$ ...... (1)
Step 2:- Substitute all values into the equation to find the value of $k$.
The given values are $M=60\; pounds$ and $E=360\; pounds$.
Substitute into equation (1).
$\Rightarrow 60=k(360)$
Divide both sides by $360$.
$\Rightarrow \frac{60}{360}=\frac{360k}{360}$
Simplify.
$\Rightarrow \frac{1}{6}=k$
Step 3:- Substitute the value of $k$ into the original equation.
Substitute $k=\frac{1}{6}$ into equation (1).
$\Rightarrow M=\frac{1}{6}\cdot E$ ...... (2)
Step 4:- Solve the equation to find the required value.
Substitute $E=186\;pounds$ into equation (2).
$\Rightarrow M=\frac{1}{6}\cdot (186)$
Simplify.
$\Rightarrow M=31\; pounds$
Hence, the tail length is $31\; pounds$.