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Class 10MathematicsArithmetic Progressions (AP)Word problems based on APsHard
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In a school laboratory (25) instruments are installed on the first day and (10) more instruments each next day. How many days are needed to install (960) instruments?

Answer and explanation

Correct answer: (12)

The instrument numbers are (25,35,45,\ldots) and (S_n=960) gives (n=12). Exam tip: when a total target is given, find the number of terms.

Related tags

ApWord-ProblemLaboratoryTargetWord Problems Based On ApsArithmetic Progressions (Ap)Arithmetic Progressions ApMathematics
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