X men can finish a piece of work in 50 days. If there were 8 men more, the work could be finished in 10 days less. The original number of men is:
Answer & explanation
Correct answer: option 4
(Total work = No. of men × no. of days)
ATQ,
X × 50 = (X+8) × 40
X × 50 = (X × 40) + (8 × 40)
50X - 40X = 320
10X = 320
X = 32