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Class 10MathematicsArithmetic Progressions (AP)Word problems based on APsEasy
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A donation box receives (80) rupees on the first day and (20) rupees more each next day. How much money is received on the (8)th day?

Answer and explanation

Correct answer: 220 rupees

The daily amount forms an AP with first term 80 and common difference 20. The 8th term is \(a_8=80+(8-1)\times20=80+140=220\). Therefore, 220 rupees are received on the 8th day. Choosing 210 would not account for the seven increases of 20 from day 1 to day 8. Exam tip: Use \(a_n=a+(n-1)d\) to find the nth term of an AP.

Related tags

Arithmetic ProgressionAp Word ProblemsNth TermCommon DifferenceClass 10 MathematicsWord Problems Based On ApsArithmetic Progressions (Ap)Arithmetic Progressions Ap
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