Question

The distance, d, an object travels is represented by the equation d = rt, where r represents the average rate of speed and t represents time. Determine the units of t if d is measured in feet and r is measured in feet per second.
A.
square feet

B.
seconds

C.
feet per second

D.
feet per second squared

Answer 1

Answer:

B. seconds

Step-by-step explanation:

We have d=rt

means that t= $\frac{d}{r}$

Given the units of each:

d: feet

r: feet/second

Replace each with its unit:

 t=    $\frac{feet}{\frac{feet}{second} }$   =  $\frac{feet.second}{feet}$  = second

So the unit of t is seconds (option B.)

Answer 2

Answer:

• B. seconds

Step-by-step explanation:

Given

• d = rt
• unit of d = feet
• unit of r = feet per second

To Find :

• unit of t

Solving :

• Since d = rt, we can rearrange it and rewrite it as t = d/r
• Now substitute the units in place of d and r
• t = d/r
• t = feet/feet per second
• t = (feet)/(feet)(second)⁻¹
• t = seconds