Question

A window washer dropped a squeegee from a platform 196 feet above the sidewalk Use the formula $t=\frac{\sqrt{h}}{4}$to find how many seconds it took for the squeegee to reach the sidewalk.

Short answer

The required time is$7s$

Step-by-step solution

Step 1:Given information

Given the time is given by$t=\sqrt{\frac{h}{4}}$

Substitute h=196 to get the time

Substituting, we get

$$\begin{gathered} t=\sqrt{\frac{h}{4}} \\ t=\sqrt{\frac{196}{4}} \\ t=\frac{14}{2} \\ t=7s \end{gathered}$$

Checking the time

Checking , we get

$$\begin{gathered} 7=\sqrt{\frac{196}{4}} \\ 7=\sqrt{49} \\ 7=7 \end{gathered}$$

So its correct