A clock is started at noon. By 15 minutes past 4, the hour hand has turned through: |
137.5° 157.5° 127.5° 117.5° |
127.5° |
Hour hand makes the angle in 12 hours = 360° Hour hand makes the angle in 1 hour = 30° Angle traced by hour hand in 4 hours 15 min (\(\frac{17}{4}\)hrs.) = 30 × \(\frac{17}{4}\) = 127.5° |