Differential and Integral Calculus by Feliciano and Uy, Exercise 1.1 Problem 4

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PROBLEM:

Express the distance DD traveled in tt hr by a car whose speed is 60 km/hr.

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SOLUTION:

Distance=Rate×TimeD=(60 km/hr)⋅t hrD=60t km  (Answer)\begin{align*} \text{Distance} & = \text{Rate} \times \text{Time} \\ D & =\left(60\:\text{km/hr} \right)\cdot t \ \text{hr} \\ D & =60t \ \text{km} \ \qquad \ \color{DarkOrange} \left( \text{Answer} \right)\\ \end{align*}
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