Question

Pari needs 4 hours to complete a work. His friend Yuvan needs 6 hours to complete the same work. How long will it take to complete if they work together?

Answer 1

4+6=10 then we can do 10/2=5 then the answer is 5

Answer 2

Answer:

In 2.4 hours both finish the work together.

Step-by-step explanation:

Time taken by Pari to finish the work = 4 hrs

One hour work of Pari = 1/4

Time taken by Yuvan to finish the work = 6 hrs

One hour work of Yuvan = 1/6

Work done by working together in an hour = 1/4 + 1/6

                                                                        = 3/12 + 2/12

                                                                        = 5/12

⇒ Time taken both working together to finish the work = 12/5 hour

                                                                                             = 2.4 hours

Therefore, In 2.4 hours both finish the work together.