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Class 10MathematicsArithmetic Progressions (AP)Word problems based on APsHard
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In a school laboratory (15) instruments are installed on the first day and (5) more instruments each next day. How many instruments are installed in (12) days?

Answer and explanation

Correct answer: (510)

The instrument numbers are (15,20,25,\ldots), and (S_{12}=510). Exam tip: use the sum formula for total installation.

Related tags

ApWord-ProblemLaboratoryWord Problems Based On ApsArithmetic Progressions (Ap)Arithmetic Progressions ApMathematicsClass 10 Mcq
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