Question

How many seconds is 3 hours 12 minutes?
(a) 10521 seconds
(b) 10510 seconds
(c) 11520 seconds
(d) 10600 seconds

Answer 1

Hint: To solve the problem, we need to know about the basics of conversion of units. Convert hours into minutes and now convert all these minutes in seconds by multiplying them with 60. 1 hour = 60 minutes and 1 minute = 60 seconds.

Complete step by step solution:
Now we use the fact that 1 hour = 60 minutes and 1 minute = 60 seconds.
Now, to calculate the number of minutes in 3 hours 12 minutes, we have,
3 hours 12 minutes = (3$\times$60) minutes + 12 minutes = 180 + 12 = 192 minutes
Now, to convert this into seconds, we have,
1 minute = 60 seconds
192 minutes = 192$\times$60 = 11520 seconds
Hence, the correct answer is (c) 11520 seconds.

Note: In questions involving basic conversions of units of time from one unit to another, we should know about a few specific conversions. Basically, it means it is important to remember that 1 hour = 60 minutes and 1 minute = 60 seconds. This is important since even if one doesn’t know the conversion from 1 minute to seconds, since we know that 1 hour = 60 minutes and 1 minute = 60 seconds, then we can get 1 hour = 60$\times$60 seconds, we have 3600 seconds. Thus, we can basically convert from any unit to another from knowing the basic conversions formulas.