Question

Michael worked out that with his mobile he spends every 17 of 20 minutes talking to his friends.He spends 3 hour 45 minutes on phone. Calculate how long he spend talking to friends.

Answer 1

Answer:

Michael spent 21 hours 15 mins talking to friends.

Step-by-step explanation:

Time spent on phone every 20 mins

= 20-17

= 3mins

3hr 45min = 225mins

Using unitary method:

Time taken (1) Time taken (2)

3 225

17 y

3y = 225×17

3y = 3825

y = 3825/3

y = 1275mins

1275mins = 21 hours 15 minutes