The hour hand of a clock is 3 feet long. How many feet does the tip of this hand move between 9:30 p. m. and 1:30 a. m. the
following day?

2π feet

Step-by-step explanation:

9:30 PM to 1:30 AM is 4 hours.

It is 1/3 of a complete revolution.

A full 12 hours would be 2×r×π=2×3×π

1/3 of that is:

1/3×2×3×π=2π

≈6.283185307 feet

the answer is d

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