SAT Ratios, rates, proportional relationships, and units Practice Question 3 (Easy)

Question bank / Ratios, rates, proportional relationships, and units

Math · Problem-Solving and Data AnalysisEasy

An office printer prints $45$ pages in $3$ minutes. At this rate, how many pages will the printer print in $20$ minutes?

$135$

$260$

$300$

$900$

Show answer and explanation

Answer: C

The printer's rate is $\frac{45}{3} = 15$ pages per minute. In $20$ minutes it prints $15 \times 20 = 300$ pages.

Choice D multiplies $45$ by $20$ , treating $45$ pages as a per-minute rate instead of a rate per $3$ minutes.

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