# Traffic is moving at 30 mph on a street you plan to cross. How big of a gap n traffic should you have in each direction in order to cross the street? A) 50 feet B) Two-thirds of a block. C) One-half mile?

Nov 25, 2016

I admit I completely invented this one but it intrigued me...

#### Explanation:

I considered that $30 \text{mph}$ corresponds to $44 \text{ft/s}$

so that your car moving at this speed will travel the distance of $50 \text{ft}$ in:

$\frac{50}{44} = 1.1 s$

considering this person very fit and...maybe to be Usain Bolt probably he can run $100 m = 328 \text{ft}$ in $10 \text{seconds}$

or $\frac{328}{10} = 32.8 \text{ft}$ each second....

and in $1.1 s$ he will cover: $32.8 \cdot 1.1 = 36.1 \text{ft}$

Considering:

...$50 \text{ft}$ in each direction should be ok...