The hour hand of an ordinary clock would have moved how many degrees in a continuous period of 1230 minutes?
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → 615 degrees
The hour hand turns through 360° in 12 hours (720 minutes), so it moves at a steady rate of half a degree per minute.
Rate: \(\displaystyle\frac{360^\circ}{720}=0.5^\circ\) per minute
In 1230 minutes: \(1230\times0.5^\circ=615^\circ\)