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2 votes
Robert drives 45 miles in 3 hours from New York City to New Jersey. How far will he drive in 5 hours?

User Chris Sidi
by
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2 Answers

5 votes
75 miles. In 1 hour it would be 15 miles. So.. 45+ 30 because 15+15=30. And we’re at 3 but need to get to 5. The answer would be 75.
User Colin Macleod
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5.2k points
4 votes


\begin{array}{ccc}3\ h&-&45\ miles\\5\ h&-&x\ miles\end{array}\ \ \ |\text{cross multiply}\\\\3x=5\cdot45\\\\3x=225\ \ \ \ |:3\\\\\boxed{x=75}\\\\Answer:\ 75\ miles.

User Nandan Bhat
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4.9k points