Question

A telephone bill cost rupees 13 for 19 minutes what is the cost in rupees for 15 minutes 50 seconds

Answer 1

Answer:Rs 10.833

Step-by-step explanation:

19 min= 19×60 seconds =1140 seconds

15 min 50 sec= 15×60+50=950 seconds

Now,

1140 sec= Rs 13

1 sec=Rs (13/1140)

Therefore,

950 sec= Rs (13/1140)*950

=Rs 10.833