Question

How long would it take to swim across a lake that is 350 meters, if you swam at 9 m/sec

Answer 1

`\boxed {\tt t\approx 38.89 \ s}`

Step-by-step explanation:

Time can be found by dividing the distance by the speed.

`t=(d)/(s)`

The distance is 350 meters.

The speed is 9 meters per second.

`d= 350 \ m \\s= 9 \ m/s`

Substitute the values into the formula.

`t=(350 \ m)/(9 \ m/s)`

Divide. Note that the meters or "m" will cancel each other out and the seconds or "s" will move to the numerator.

`t=(350 )/(9 \ s)`

`t=(350 \ s)/(9)`

`t=38.8888889 \ s`

Round to the nearest hundredth. The 8 in the thousandth place tells us to round the 8 to a 9.

`t \approx38.89 \ s`

It will take about 38.89 seconds to swim 350 meters at 9 meters per second.