Question

Which of the following were the earliest methods of calculating time?

• A. Sundial
• B. Pendulum clock
• C. Hourglass
• D. Wall clock

Answer 1

Answer: (A), (C)

The correct options are
A Sundial
C Hourglass

The Sumerians used sundials and hourglasses to calculate time. Sundials were used to calculate time based on the position of the Sun and the shadow it would cast. The hourglass is a sand timer where it takes a certain time for the sand to get completely transferred from the upper chamber to the down. Pendulum clocks and wall clocks are more modern time-measuring devices.