Question

"A" can do a work in 10 days and "B" can do the same work in 16 days. With the help of C they do the work in 4 days only. In how many days "C" can do the work alone?​

Answer 1

Answer:

'C' can do the work in 12 days.

Step-by-step explanation:

'A' can do it in 10day                

'B' can do it in 16 days

'C' helps be and they can do it in 4 days

'B' alone can do it in 16 days and with 'C' help it can do it in 4 days.  

16 - 4 = 12

='C' can do the work in 12 days.

Answer 2

a =10day

b=16day

a+b+c=4days

lcm of 10,16,4is80

so A efficiency is 8

B efficency is 5

A +B+C IS 20

therefore( A+B+C) -(a+b)=80

20-13=80

so 80/7days taken by c to do whole work