Question

Convert the time units of following questions,

1. 20 minutes = …………. seconds

2. 6 1/2 minutes = …………. seconds

3. 15 1/4 minutes = …………. seconds

4. 4 hour = …………. seconds

5. 2 3/4 hour . seconds

Answer 1

1. 20 minutes = 20 x 60 seconds
= 1200 seconds

2. 6 1/2 minutes = 6 minute + 1/2 minute

= 6 x 60 seconds + 1/2 x 60 seconds
= 360 seconds + 30 seconds
= 390 seconds

3. 15 1/4 minutes = 15 minute + 1/4 minute

= 15 x 60 seconds + 1/4 x 60 seconds
= 900 seconds + 15 seconds
= 915 seconds

4. 4 hour = 4 x 60 minutes

= 240 minute = 240 x 60 seconds
= 14400 seconds

5. 2 3/4 hour = 2 hour + 3/4 hour

= 2 x 60 minutes + 3/4 x 60 minutes
= 120 minutes + 3 x 15 minutes
= 120 minutes + 45 minutes
= 120 x 60 seconds +45 x 60 seconds
= 7200 seconds + 2700 seconds
= 9900 seconds