Question

please answer it if you can​

Answer 1

Answer:

18 days

Step-by-step explanation:

engineer said he could finish highway sector in 3 days

Let us suppose that he had X machines

so with X machines he took 3 days to complete the work

Again given that if 3 more machines were used then completes in 2 days

so in 2 days X+3 machines work will be = 3 days with X machines

==> 2 ( X + 3 ) = 3 X

==> X = 6 machines

so from this total work is 3X parts = 3 × 6 = 18

if we make with one machine 18/1 = 18 days