Question

6 men can complete the electric fitting in a building in 7 days how many days will it take 21 men to do the job

Answer 1

hello friend

6 men can complete the job in 7 days

1 man can complete the job in 6x7 = 42days

21 men can complete the job in 42/21 days = 2 day

hope it helps :-)

Answer 2

let days = x
$6 \times 7 = x \times 21 \\ x = \frac{6 \times 7}{21} \\ x = 42 \div 21 \\ x = 2 \: days$