What is the cast price of the mobile phone call that lasts for 3 min – InterviewSolution

1.	What is the cast price of the mobile phone call that lasts for 3 minuteat the rate of 50% per 30 seconds?
Answer» 10 RS cost for 3 minutes 30 second1minute= 60 seconds3× 60= 180 secondsNow we can write in seconds10 rs cost for 210 seconds (180+30)(210÷10)=21 which mean 1rs cost 21 SECONDSFOR 4 minutes 10 seconds4×60 =240 seconds240+10=250 seconds(250÷21)= 11.90 rsThe cost of bill is 11.90 rs for 4 minutes 10 seconds

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