RD Sharma Solutions Class 11 Sine And Cosine Formulae And Their Applications Exercise 10.2

RD Sharma Solutions Class 11 Chapter 10 Exercise 10.2

RD Sharma Class 11 Solutions Chapter 10 Ex 10.2 PDF Free Download

Exercise 10.2

Practise This Question

A person is to count 4500 currency notes. Let an denote the number of notes he counts in the nth minute. If a1=a2=...=a10=150 and a10,a11,... are in an AP with common difference - 2, then the time taken by him to count all notes is