Mathematics, 15.02.2021 06:50 ryanmorse01

Ratna , who is in Mumbai , telephones her brother Ravi in Ahmedabad and speaks for 89 seconds . She is charged Rs 1.20 for every 16 seconds or part of 16 seconds . There is also a service charge of Rs 2 / - . Study the bill carefully . How much will it cost Ratna if she speaks to Ravi for 3 minutes ? A) 14.40
B) 16.40
C) 18.40
D) 20.40

Please give explanation of your answer , please .

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