a) In the postpaid tariff plan of a mobile company, they charge Rs. 100 as monthly rental and 30paise per minute for calls. Write down an algebraic expression to represent the cost of the bill, if m represents the number of minutes spent on the calls.
b) Find the cost of the bill for a talk-time of one hour.
In the tariff plan, monthly rental is Rs. 100, which is constant, and the rate of calls changes per minute.
a) For m being the number of minutes spent on calls, the algebraic expression is 100 + 30m
b) One hour = 60mins
Cost of bill = 100 + 30(60)= Rs.100 + Rs.180 = Rs.280
You have rated this answer /10