Question

3. How did people keep a track of time in
olden days?​

Answer 1

Answer:

One of the earliest of all devices to tell time was the sundial. The sundial is looked on as being a form of sun-powered clock. ... There was another more advanced shadow clock or sundial in use by the ancient Egyptians around 1500 BC. This shadow clock or sundial permitted one to measure the passage of hours within a day

Explanation:

Answer 2

Answer:

1)length of shadow

2)sundial