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4 years ago
A, B & C can independently do a job in 15,20 and 30 days. theywork together for some time after which C leave .a total of 18000/- is paid for the work & B gets 6000 more than C. for how many days did A work ?
3 years, 6 months ago
Let the total work to be done be 60 units.
So, A must do 4 units/day, B 3 units/day and C 2 units/day.
A and B must have done work on equal number of days. So, their salaries must be in the ratio 3:4.
Lets suppose B gets 3x salary. So, A gets 4x salary and C 3x-6000.
=> x = 2400
So, C's total salary will be 3 X 2400 - 6000 = 1200
So in the days C worked, B and A must get 1800 and 2400 salaries i.e. a total of Rs 5400.
=> Work done in these days is 5400/18000 = 54/180 = 3/10 or 18 units of work.
18 units of work can be completed by them in 2 days together.
The rest of the 42 units of the work can be completed by A and B in 6 days.
So, A worked for a total of 6+2 = 8 days
4 months, 4 weeks ago
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