Question

A certain number of men can Complete a job in 30 days. If there were 5 men more, it could be completed in 10 days less. How many men were in the beginning? Answer with the solution. Thanks

Answer 1

formula
(men1×Time1)work1=(men2×Time2)work2
in this ques same work is done means 1

men1 = x
time1 = 30 days
men2 = (x+5)
time2= 30-10=20 days

(men1×Time1)work1=(men2×Time2)work2
30x=[x+5]20
30x=20x+100
x=10 men

Answer 2

x/y=1/30
-->y=30
x+5/y=1/20
x+5/30x=1/20
20x+100/30x=1
20x+100=30x
100=30x-20x
100=10x
x=10