Solve the Problem $T$ In Seconds for a Pendulum of Length $L$

Multiple Choice

Solve the problem.
-The time $T$ in seconds for a pendulum of length $L$ feet to make one swing is given by $T=2 \pi \sqrt{\frac{L}{41}}$ . How long is a pendulum (to nearest hundredth) if it makes one swing in 1.7 seconds? Use 3.14 for $\pi$ .

A) $18.87 \mathrm{ft}$
B) $3 \mathrm{ft}$
C) $29.62 \mathrm{ft}$
D) $118.49 \mathrm{ft}$