৭২১১
Rahim and Karim can finish a work together in 6 hours. If Rahim takes 3 times as long as Karim to finish the job alone, how long will Karim take to finish the job alone?
উত্তর
8 hours
৭২১২
If 8 men or 12 women can complete a work in 40 days, how many days would it take 20 men and 18 women to complete twice the work?
উত্তর
20 days
৭২১৩
A worker’s regular pay is Tk. 15 per hour up to 40 hours. Overtime is paid at twice the regular rate. If he was paid Tk. 1,050, how many hours of overtime did he work?
উত্তর
15 hours
৭২১৪
A man completes 2/5 of a work in 8 days. If his work rate is doubled, how many more days will it take him to finish the remaining work?
উত্তর
6 days
৭২১৫
A can complete a work in 20 days, B in 30 days, and C in 60 days. A stops working 4 days before the completion of the work, and B stops 6 days before completion. C continues working alone till the end. What was the total number of days taken to complete the entire work?
উত্তর
14 days
৭২১৬
P is 25% more efficient than Q. How much time will they, working together, take to complete a job which Q alone could have done in 27 days?
উত্তর
12 days
৭২১৭
C and D together can complete a task in 6 days. C alone can do it in 10 days. How many days would it take D to do this job alone?
উত্তর
15
৭২১৮
Rafi alone can complete a work in 10 days and Tareq alone can complete it in 15 days. Rafi and Tareq undertook to complete the work for Tk. 7500. With the help of Salman, they finished the work in 5 days. How much should Salman be paid?
উত্তর
Tk. 1250
৭২১৯
Machine A paints y units in 15 minutes and machine B paints 3y units in 30 minutes. In how many minutes will A and B, working together, paint 45y units?
উত্তর
270 minutes
৭২২০
X can complete a work in 12 days, and Y alone can do it in 18 days. They work together for 6 days, and Z completes the remaining work in 3 days. If the total payment for the work is Tk. 600, how much should Z get?
উত্তর
Tk. 100