Answer:First, let us determine the constants and the variables by representing them. Let us use “w” for work done; let “n” the number of people; let “r” be the rate of work each people can do; and, “t” for the time each work is done.
Second, one (1) “w” can be finished by five people within five hours, or:
w = (n)(r)(t)
1 = 5r(5)
1 = 25r
r = 1/25 which means that the rate of one person is 1/25.
Thus, if there are two (2) people that can do the same rate of work, then:
w = (n)(r)(t)
Substitute necessary values:
1 = 2(1/25)t
1 = (2/25)t
t = 25/2
t = 12.5 hours
For two people to finish painting the wall, the job will last for 12.5 hours.
Step-by-step explanation: Mag aral ka ng mabuti ha :>
