Police Use a Formula $s=S \sqrt{\frac{l}{L}}$ , Where Sis the Test- Car Speed And

Multiple Choice

Police use a formula $s=S \sqrt{\frac{l}{L}}$ , where Sis the test- car speed and $L$ is the test- skid length, to find the actual speed $\mathrm{s}$ in an accident which left a skid mark of 1 . Find the speed (nearest whole mph) when $\mathrm{S}=45 \mathrm{mph}, \mathrm{l}=150 \mathrm{ft}, \mathrm{L}=100 \mathrm{ft}$ .

A) $37 \mathrm{mph}$
B) $68 \mathrm{mph}$
C) $55 \mathrm{mph}$
D) $95 \mathrm{mph}$