Riya uses 1.5 GB a day in a 30-day month.

Question 16

MediumOriginal question

Plan A costs ₹199 a month plus ₹2 for every GB of data used. Plan B costs a flat ₹299 a month with unlimited data. Let $x$ be the GB used in a month.

Riya uses 1.5 GB a day in a 30-day month. Which plan is cheaper for her, and by how much?

Plan B, by ₹10Correct answerYour answerPlan A, by ₹55Correct answerYour answerBoth cost the sameCorrect answerYour answerPlan A, by ₹10Correct answerYour answer

Show the answer and explanation

CorrectNot quiteAnswer D

Correct answer: D

She uses $1.5 \times 30 = 45$ GB, so Plan A costs $199 + 90 = 289$ rupees.
$45 < 50$ : Plan A is cheaper, by $299 - 289 = 10$ rupees.

Worth noting

₹55 counts only ₹1 a GB.

Concept: Using the solution of an inequality
Typical timeTypical: 120 s
Your timeYours: —

The rule this testsThe laws of inequality

Practise this chapter →

Ten questions from Numerical Inequalities, at your own pace.

Practise this chapter →

Ten questions from Numerical Inequalities, at your own pace.

Riya uses 1.5 GB a day in a 30-day month.

Question 16

Explanation