Answer the Question $s = S \sqrt { \frac { l } { L } }$

question 39

Multiple Choice

Answer the question.
-Police use a formula $s = S \sqrt { \frac { l } { L } }$ , where $S$ is the test-car speed and $L$ is the test-skid length, to find the actual speed $s$ in an accident which left a skid mark of l. Find the speed (nearest whole mph) when $S = 54 \mathrm { mph }$ , $l = 150 \mathrm { ft } , \mathrm { L } = 100 \mathrm { ft }$ .

• A) \(66 \mathrm { mph }\)
• B) \(44 \mathrm { mph }\)
• C) \(81 \mathrm { mph }\)
• D) \(104 \mathrm { mph }\)

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