What is the angle between the hour hand and the minute hand of a clock at 1:40?

Answer and explanation

Correct answer: D. 170°

  1. Step 1: Recall the formula for the angle between clock hands: , where is the hour mark and is the minutes elapsed.
  2. Step 2: Substitute and : .
  3. Step 3: Because the angle exceeds , find the smaller interior angle by subtracting from : .
Answer
170°.

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