Where will the hand of a clock stop if it: a) Starts at 12 and makes 1/2 of a revolution, clockwise? B) Starts at 2 and makes 1/2 of a revolution, clockwise? C) Starts at 5 and makes 1/4 of a revolution, clockwise? D) Starts at 5 and makes 3/4 of a revolution, clockwise? 

Solution:

1 complete revolution or full rotation, means a complete turn so it points back the same way.

Let's understand the concept of turning clockwise and anti-clockwise.

In one complete revolution, the clock hand moves 360° or 12 hours.

⇒ 1 revolution = 12 hours 

Using the unitary method, we have 

1/2 of a revolution = 12/2 = 6 hours

1/4 of a revolution = 12/4 = 3 hours

3/4 of a revolution = 3 × 12/4 = 9 hours

A) If the clock hand starts at 12 and makes 1/2 of a revolution, it would stop after 6 hours, that is, at 6 o'clock.

B) If the clock hand starts at 2 and makes 1/2 of a revolution, it would stop after 6 hours, that is, at 8 o'clock.

C) If the clock hand starts at 5 and makes 1/4 of a revolution, it would stop after 3 hours, that is, at 8 o'clock.

D) If the clock hand starts at 5 and makes 3/4 of a revolution, it would stop after 9 hours, that is, at 2 o'clock.

Therefore, a) The clock hand will stop at 6, b) The clock hand will stop at 8, c) The clock hand will stop at 8, d) The clock hand will stop at 2

Where will the hand of a clock stop if it: a) Starts at 12 and makes 1/2 of a revolution, clockwise? B) Starts at 2 and makes 1/2 of a revolution, clockwise? C) Starts at 5 and makes 1/4 of a revolution, clockwise? D) Starts at 5 and makes 3/4 of a revolution, clockwise? 

Summary:

a) The clock hand will stop at 6, b) The clock hand will stop at 8, c) The clock hand will stop at 8, d) The clock hand will stop at 2