Question

for her mobile phone service divya pays rs.145 per month and 75 paise for each extra minute she talks over the allowed number of minutus in the monthly plan .she received a bill of rs.178 last month.how many extra minutes did she use her phone beyond the allowed number.

Answer 1

let the number of minutes overtime be x
therefore total amount = 145 + 0.75x
so 178 = 145 + 0.75x
33 = 0.75x
66 = 1.5x
22 = 0.5x
x = 44
therefore she talked 44 minutes overtime

Answer 2

let the number of minutes overtime be x
therefore total amount = 145 + 0.75x
so 178 = 145 + 0.75x
33 = 0.75x
66 = 1.5x
22 = 0.5x
x = 44

So she talked 44mins extra

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