Question

a, b and c together can finish a task in 7.5 days . c is thrice as productive as a A and b alone can do the task in 15 days. in how many days can c do the job if b goes on leave.?​

Answer 1

Answer:

Let the working efficiency of B=2

Then total work done by B=2× 15=30 unit

Let the working efficiency of A=x

Then C working efficiency =3x

Then (2+x+3x)7.5= 30

30x=15

X=0.5

Then A and C combine efficiency= 4x=4× 0.5=2

Time taken by A and C in completing the work=

Step-by-step explanation: