Question
Billy, Tony and Mike were three workers, employed by a
Contractor. They completed the whole work in 20 days. Initially all of them worked together, but the last 60% of the work was completed by only Tony and Mike together. Billy worked with Tony and Mike only for initial four days then he left the work due to his poor health. Also, Tony takes 25% less time to finish the work alone than that of Mike working alone. If they were paid Rs. 150000 for the entire work, then what is the share of least efficient person?Solution
Initial 4 days [Billy + Tony + Mike (40%)] + Last 16 days [Tony + Mike (60%)] = Total 20 days From the above statement, it is clear that efficiency of Tony and Mike is 60/16 = 3.75% Efficiency of Billy, Tony and Mike is 40/4 = 10%. It means efficiency of Billy alone is (10-3.75) = 6.25% Now, Tony : Mike Number of days 3 : 4 Efficiency 4 : 3 ∴ Efficiency of Tony = 4/7 ×3.75 = 2.14% Efficiency of Mike = 3/7 ×3.75 = 1.61% Thus the least efficient person is Mike Share of work done by Mike= 1.61 × 10 = 16.1% ∴ Mike’s Share of Amount = 16.1% of 150000 = 24150
A coach sees an athlete 85 meters ahead on the track and begins running after him. The athlete is running at a speed of 19 m/sec, while the coach runs a...
A person 'X' covered a distance of 'd+40' kilometers at a speed of 40 km/h, another distance of 'd' kilometers at a speed of 15 km/h, and a third distan...
- A delivery boy travels a certain distance from his warehouse to the customer’s house. At a speed of 15 km/h, he arrives 18 minutes late. But when riding ...
- A spy is 1.8 km ahead of an agent who begins to chase him. The agent runs at a speed of 12 m/s, while the spy runs at 8 m/s. How much time will the agent t...
A car covers its journey at the speed of 80 km/hr in 10 hours. If the same distance is to be covered in 4 hours, by how much the speed of the car will h...
As observed from the top of a light house, 120 √3 m above the sea level, the angle of depression of a ship sailing towards it changes from 30°...
A car travels at 60 km/h for 1 hour, 45 km/h for 2 hours, and 90 km/h for 1 hour. Find its average speed.
A car travels from town A to town B at 40 km/h and returns from B to A at 50 km/h. If the distance between A and B is 100 km, find the average speed for...
Armaan is traveling at a speed of 40 km/h, and it takes him 90 minutes to reach his office. However, after completing half of the journey, Armaan took a...
A man is travelling at a speed of 20 km/h such that he will take 60 minutes to reach his destination. But after completing half the journey, the man too...