Question

Esha,babu and chitra work in a handicraft factory. Esha alone takes 10hrs to complete a single product but babu and chitra working together takes 4hrs for the completion of the same product. If all of them worked together and completed 14 products then how many hours they have worked ?

a.54
b.28
c.40
d.20

Answer 1

Answer:

Step-by-step explanation:

Eesha= 1/10 work per unit

Babu+chitra = 1/4 work per unit

Esha+babu+chitra=1/10+1/4=7/20

1 product in 20/7=2.85714

14 product = 2.85714 * 14= 40 hrs..

So the answer is 40 hrs..

Answer 2

Answer:

Step-by-step explanation:

As Given:

Esha can complete the work                                 = 10 Hours

Esha’s 1 hour’s work                                               = 1/10

Chitra and Babu can complete the work             = 4 Hours

Chitra and Babu’s 1 hour’s work                           = 1/4

Chitra , Babu’s and Esha’s 1 hour’s work             = 1/4+1/10=(5+2)/20

                                                                                  =7/20=20/7 hr.

For 14 products can be completed                       =20/7×14=20×2=40hrs.Ans.

So we found if all work together the work will be completed in 40 hrs.