Get Started with ixamBee
Start learning 50% faster. Sign in now
Get Started with ixamBee
Start learning 50% faster. Sign in nowATQ,
Let the number of workers be 'W' and each has efficiency 'e' units/day.
Total work = W × 36 × e = 36We units.
ATQ:
36We = W × e + (W - 5 × 1) × e + (W - 5 × 2) × e + .... + (W - 5 × 47) × e
Or,
36W = 48W - 5 × (1 + 2 + 3 + .... + 47)
⇒ 12W = 5 × 47 × (48/2)
⇒ W = (5 × 47 × 24) ÷ 12 = 470
Let the required time be T days for 90 workers.
So, 36 × 470 × e = 90 × T × e
⇒ T = (36 × 470) ÷ 90 = 188
What % of a day is 30 minutes ?
A can cultivate 3/5th of the land in 15 days and B can cultivate 1/4th of the land in 10 days. In how many days working together A...
A and B can do a work in 21 days, A is (7/4) times as efficient as B. In how many days, A alone can complete the (100/3)% of the work?
A contractor hires 12 workers to complete a project in 20 days. After 8 days, 4 more workers are employed, and the project is completed 2 days earlier. ...
Two cars start from a house at an interval of 10 minutes and travel at a speed of 20 km/hr. With how much speed (km/hr.) should a woman coming from the ...
A can complete a certain work in 30 days. B is 25% more efficient than A and C is 20% more efficient than B. They all worked together for 3 days. B alon...
P and Q can complete a project in 15 days and 10 days, respectively. They started doing the work together, but after 2 days, Q had to leave and P alone...
A person from the top of a hill observes a vehicle moving towards him at a uniform speed. It takes 10 minutes for the angle of depression to change from...
A car running with a speed of 69 km/hr takes 28 hours to go from 'A' to 'B'. If on the way back from 'B' to 'A', the car takes 20% less time than it tak...
Pipe A can fill the tank 5 times faster than pipe B, if pipe A and B together fill the tank in 50 minutes, then pipe B alone can fill the tank in:
