Query Detail : SEBI Grade A Officer Phase I Paper 1

Can you please explain ho to solve this: A group of 50 men is employed to complete some work in 41 days. After 30 days, 10 more men are employed and the work is finished 1 day earlier. If 10 more men were not employed, how many more days would it have taken beyond the expected period
prakash,   September 25th 2020,  
SEBI Grade A Officer Phase I Paper 1


After 30 days, work should be finished in rest 11 days but as more men joined so remaining work is done in 1 day early means in 10days So ATQ,

50 * 30 + (50+10)*10 = 50* T

1500+600 = 50*T

2100 = 50T

So T = 42 days

Hence extra time beyond the expected period = 42-41 = 1day