Syntel Company Numerical Ability Time and Work

A certain number of men completed a piece of work in 80 days. if there were 10 men more, the could be finished in 10 days less. How many men were originally there?
[A] 80 men
[C] 70 men
[B] 45 men
[D] 60 men

Read Solution (Total 2)

let originally there were x men.
x men 1 day work=1/80
1 man 1 day work=1/80x
x+10 men 1 day work=1/70
1 man 1 day work=1/70(x+10)
so 1/80x=1/70(x+10)
80x=70(x+10)
10x=700
so x=70
11 years agoHelpfull: Yes(12) No(0)

c) 70 men
80x=(10+x)70
80x=700+70x
x=70
10 years agoHelpfull: Yes(7) No(0)

Syntel Other Question

A can do a piece of work in 5 hours, B in 9 hours and C in 15 hours. if C could work with them for 1 hour only, the time taken by A and B together to complete the work is.
[A] 8 hours
[C] 5 hours
[B] 3 hours
[D] 2 hours if 8 men or 16 boys can finish a piece of work in 25 days. in how many days can 10 men and 20 boys finish it?
[A] 15 days
[C] 8 days
[B] 14 days
[D] 10 days