Question

Rajeev takes one hour to arrange 96 books.Sanjeev takes one and a half hour to arrange the same number of books.Working together in how many hours they will arrange 4000 books?​

Answer 1

Answer:

Rajeev and Sanjeev together arrange 4000 books in 25 hours

Step-by-step explanation:

Rajeev takes one hour to arrange 96 books

Sanjeev takes one and a half hours to arrange 96 books

Now, number of books arranged by Sanjeev in 1 hour $=\frac{96}{1.5}=64\hspace{0.1cm}books$

Thus,

Number of books arranged by (Rajeev + Sanjeev) in 1 hour $=(\,96 + 64)\, = 160\hspace{0.1cm}books$

160 books arranged in 1 hour

4000 books are arranged in $\frac{4000}{160}=25\hspace{0.1cm}hours$

Hence, Rajeev and Sanjeev together arrange 4000 books in 25 hours