Page 115 - New Medley 3 Semester 2

Conversion of Time

Conversion of Smaller Units

We know that 1 hour = 60 minutes

1 day = 24 hours

Example 1: How many minutes are there in:
(a) 2 hours (b) 6 hours (c) 7 hours 10 minutes?

Solution: (a) As 1 hour = 60 minutes

So, 2 hours = 2 × 60 minutes = 120 minutes

(b) As 1 hour = 60 minutes

So, 6 hours = 6 × 60 = 3600 minutes

(c) 7 hours 10 minutes = 7 × 60 minutes + 10 minutes

= 420 minutes + 10 minutes

= 430 minutes

Example 2: How many hours are there in:
(a) 3 days (b) 8 days (c) 2 days 4 hrs (d) 240 min?

Solution: (a) As 1 day = 24 hours

So, 3 days = 3 × 24 hours = 72 hours

(b) As 1 day = 24 hours

So, 8 days = 24 × 8 hours = 192 hours

(c) 2 days 4 hours = 2 × 24 hours + 4 hours

= 48 hours + 4 hours = 52 hours

(d) 240 minutes = 240 ÷ 60 minutes = 4 hours

Conversion of Bigger Units

We know that

 7 days = 1 week 30 days = 1 month

  365 days = 1 year 12 months = 1 year

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