1.

There are 10 labours, who when working together, can load certain number of sacks in five hours on the truck.The sacks carrying efficiency per hour of the ten labours are in the ratio of 1:2:3:4:5:6:7:8:9:10.Initially all the 10 labours started working. After 1st hour each the labour carrying maximum number of sacksstops working. After the 2nd hour the labour carrying second maximum number of sacks stops working and thiscontinues. Find the time in which all the sacks are loaded on the truck.

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