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Let the total amount of work = 60 units {LCM of 15 and 20} Then, efficiency of ‘A’ = 60/15 = 4 units/day Efficiency of ‘B’ = 60/20 = 3 units/day Combined efficiency of ‘A’ and ‘B’ = 4 + 3 = 7 units/day Work completed by ‘A’ and ‘B’ together in 5 days = 5 × 7 = 35 units Remaining work = 60 – 35 = 25 units Time taken by ‘A’ alone to complete the remaining work = 25/4 = 6.25 days
‘A’ can do 30% of the work in 12 days. ‘B’ can do the whole work in 50 days. Find the time taken by them together to do 75% of the work.
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'K' and 'L' together can complete a work in 24 days. They started working together but after 16 days, 'L' left and remaining work was completed by 'K' a...
A and B can jointly finish a task in 42 days, while B and C together take 35 days to finish the same task. If B can finish the task alone in 105 days, h...
A and B together can complete a work in 20 days. After working together for 8 days, B leaves, and A completes the remaining work in 16 more days. In how...
A can finish a task in 32 days, while B can complete the same task 8 days sooner than A. If they together earn a total of Rs. 1050 for the job, how much...
'A' and 'B' can together complete a job in 15 days. If 'B' alone can finish 50% of the job in 20 days, how long would it take 'A' alone to complete the ...
4 girls working together for 1 day complete the same amount of work as 6 men working together for 1 day. The efficiency of 1 man ...
Rahul, Rohit, and Raj alone can complete a project in 40, 80, and 120 days respectively. All of them started working together, but after 10 days, Rahul ...
