Question

the average age of children of class 7th is 12 years and 3 months Express this age in seconds

Answer 1

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One hour has 60×60 = 3600 seconds.
One day has 3600×24 = 86400 seconds.
And 7 years 3 months has 7×365 + 3×30 days = 2555 + 90 = 2645 days (generalised).
So the number of seconds will be 2645×86400 = 228528000 seconds.

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Answer 2

Given that,

The average age of children of class 7th is 12 years and 3 month.

To find,

The age in seconds

Solution,

We know that,

1 year = 365 days

12 year = 12 × 365 = 4380 days

1 month = 30 days

3 month = 3 × 30 = 90 days

It means,

12 years and 3 months = 4380 days + 90 days

= 4470 days

1 day = 24 hours

1 hour = 3600 seconds

So,

12 years and 3 months = (4470 × 24 × 3600) seconds

= 386208000 seconds

Hence, 12 years and 3 months is equal to 386208000 seconds.