SAT Math Multiple Choice Practice Question 67: Answer and Explanation

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Question: 67

1. How many degrees of arc does the minute hand of a clock cover in 20 minutes?

A. 180
B. 120
C. 60
D. 30
E. 20

Correct Answer: B


B. Twenty minutes is one-third of an hour, so the minute hand covers one-third of a circle. Because a full circle has 360°, one-third of a circle is 1/3 × 360° = 120°.

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