Vince began practicing piano at 11:15 P. M He stopped at 11:35 P. M How many degrees did the minute hand turn during Vince practice time? Complete the explanation how you found your answer

Vince began practicing piano at 11:15 P.M

He stopped at 11:35 P.M

=> He practiced in 35 - 15 = 20 mins = 1/3 hour.

=> 1/3 hour means 1/3 circle, the number of degrees the minute hand turned:

N = (1/3) x 360 = 120 deg (1 circle = 360 deg)

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