Question

What must you do to calculate a meaningful value of distance from the following equation?

Answer 1

Answer:

Convert all the times to either hours or seconds

Explanation:

One time unit is in hours, and the other is in seconds.  In order to do the math, the units need to be the same.  So you either need to convert hours to seconds, or seconds to hours.

Answer 2

Answer:

-Convert all the times to either hours or seconds.

Explanation:

Given,

$d= (0.90km) + (12.5km/h) \times (31.5s)$

While doing a mathematical calculation all the units should be same otherwise the result will not be correct. Here two units of time i.e. second and hour are being used. We will convert the second to hour by dividing it by 3600 as there are 3600 seconds in one hour. The distance will be,

$d= (0.90km) + (12.5km/h) \times (\frac{31.5}{3600}h)$

$d= 0.90 + 12.5 \times \frac{31.5}{3600}$

$d= 0.90 + \frac{393.75}{3600}$

$d= 0.90 + 0.109$

$d= 1.009 km$