A and B can complete work together in 5 days. If A works at twice his speed and B at half of his speed, this work can be finished in 4 days. How many days would it take for A alone to complete the job?

examrobotsa's picture
Q: 56 (IAS/2007)
A and B can complete work together in 5 days. If A works at twice his speed and B at half of his speed, this work can be finished in 4 days. How many days would it take for A alone to complete the job?

question_subject: 

Maths

question_exam: 

IAS

stats: 

0,5,2,5,1,1,0

keywords: 

{'speed': [0, 1, 2, 0], 'work': [1, 1, 10, 7], 'half': [5, 2, 5, 2], 'days': [0, 0, 2, 0], 'many days': [0, 0, 4, 1], 'job': [0, 1, 2, 1]}