Question

Use the formula d = rt. Find t for r = 49.5 m/h and d = 504.9 m. 24,993 h 10.2 h 0.1 h 455.4 h

Answer 1

`\bold{METHOD\ 2:}\\\\\text{Substitute the values of}\ r=49.5\ (m)/(h)\ \text{and}\ d=504.9\ m\ \text{to the formula}\ d=rt:\\\\504.9\ m=49.5\ (m)/(h)\cdot t\\\\\text{solve for}\ t:\\\\49.5\ (m)/(h)\cdot t=504.9\ m\qquad\text{divide both sides by}\ 49.5\ (m)/(h)\\\\t=504.9\ m:\left(49.5\ (m)/(h)\right)\\\\t=(504.9)/(49.5)\ m\!\!\!\!\!\diagup\cdot(h)/(m\!\!\!\!\!\diagup)\\\\t=10.2\ h`

Explanation:

`\bold{METHOD\ 2:}\\\\\text{Substitute the values of}\ r=49.5\ (m)/(h)\ \text{and}\ d=504.9\ m\ \text{to the formula}\ d=rt:\\\\504.9\ m=49.5\ (m)/(h)\cdot t\\\\\text{solve for}\ t:\\\\49.5\ (m)/(h)\cdot t=504.9\ m\qquad\text{divide both sides by}\ 49.5\ (m)/(h)\\\\t=504.9\ m:\left(49.5\ (m)/(h)\right)\\\\t=(504.9)/(49.5)\ m\!\!\!\!\!\diagup\cdot(h)/(m\!\!\!\!\!\diagup)\\\\t=10.2\ h`

Answer 2

`t = (504.9m)/(49.5 m/h)= 10.2`

And the best option would be:

10.2 h

Explanation:

We have the following formula for the distance:

`d = rt`

And we want to find the value of t with r = 49.5 m/h and d = 504.9 m. If we solve from t we got:

`t = (d)/(r)`

And replacing the info given we got:

`t = (504.9m)/(49.5 m/h)= 10.2`

And the best option would be:

10.2 h