**Definitions:**

**Second** (abbreviations: **sec, or s, or s (SI), or sec (US)**): is the base unit of time in the International System of Units (SI, Système International d'Unités). It is the second division of the hour by sixty, where the first division by sixty being the minute.

**Hour** (abbreviations: **hr, or h**): is a unit of time, conventionally counted as 1/24 of a day. In the modern metric system, it is equivalent to 3,600 seconds.

## How to Convert Seconds to Hours

*Example: How many hours are equivalent to 47.56 seconds?*

As;

1 seconds = 0.000277777 hours

47.56 seconds = Y hours

Assuming Y is the answer, and by criss-cross principle;

Y equals 47.56 times 0.000277777 over 1

(i.e.) Y = 47.56 * 0.000277777 / 1 = 0.01321107412 hours

Answer is: 0.01321107412 hours are equivalent to 47.56 seconds.

*Practice Question: Convert the following units into hr:*

N.B.: After working out the answer to each of the next questions, click adjacent button to see the correct answer.

( i ) 20.81 sec

( ii ) 99.05 sec

( iii ) 76.02 sec