Question

plse solve this

Answer 1

how much work can 1 man do?

Answer 2

in a day that is ....

Answer 3

strategy:

1. determine how much work 1 man can do in 3 days
2. determine how many are needed to do 3/4 of a job
3. remove the 20 you already have to determine how many are needed

Answer 4

use unitary method.

Answer 5

20 men, 36 days, to do 1 job

1 man, 36 days, to do 1/20th of a job

1 man, 36/12 days, to do 1/(20*12) of a job

1 man, 3 days, to do 1/(240) of a job

x/240 = 3/4 is what i see it as

Answer 6

x= 20 is answer

Answer 7

if 20 can only do 1/4 of the work in 9 days, they can only do 1/12 of the work in 3 days

3 3 3 9
(1/12)+(1/12)+(1/12) = 3/12 = 1/4


if you are suggesting 20 extra guys to do 3/4 of the work in 3 days:

20 20
(1/12 + 1/12) in 3 days = 2/12 = 1/6, not 3/4

Answer 8

x = 180 is the solution to my ratio above, and we already have 20 men, so we need how many more?

Answer 9

i m not getting it

Answer 10

20 men do 1/4 of a job in 9 days

itll take them 4 times as long to complete the job ....

20 men do 4/4 of a job in 9(4) days

1 man does 1/20 of the job in 36 days

1 man does 1/[20*36] of the job in 1 days

1 man does 3/[20*36] of the job in 3 days

therefore, 1 man does 1/240 of a job in 3 days

how many men are needed to finish the 3/4 of a job in 3 days?

x*1/240 = 3/4

x = 3(240)/4 = 180 men, we already have 20 men working for us, so we need to hire:

180 - 20 more men to accomplish our goal

Answer 11

it means 160 is anwer