Time taken by B to complete the work = 40 – 20 = 20 days Let the total work = 40 units Efficiency of A = 40/40 = 1 units/day Efficiency of B = 40/20 = 2 units/day Required time taken = 0.60 x 40/(1+2) = 8 days
In how much time will a train running with a speed of 72 km/hr cross the second train?
I. The length of the two trains is 80 metres and 100 metre...
Suppose train P crosses train Q in 55 sec when travelling in same direction then, Determine the length of train P.
Statement I : Speed of train ...
What is the smallest number of the six numbers?
I.The average of six consecutive odd numbers is 8.
II. The sum of six consecutive od...
Find the ratio of Ram’s age to Rahul’s age.
Statement I: Ram’s age is equal to Alok’s age and Alok age is 2 years l...
What is the value of 'p'?
Statement I: A group of (p + 16) boys can finish a task in 10 days, while a group of (p + 6) girls can finish the sam...
A train crosses another train running in the opposite direction in 25 seconds. What is the speed of the train?
I. Both the trains are running at ...
What is the probability of getting two white balls from a box containing only white and blue balls?
Statement I : There are total 72 balls in t...
Train A crosses another train B running in the opposite direction in 180 seconds. What is the speed of the train A?
Statement I - Speed o...
In an office, the number of men exceeds the number of women by 13. The average weight of all employees (men and women) is 5 kg hi...
What was the profit earned by selling Shoes?
Statement I : The article was sold for Rs 2700 after getting a discount of 10% on the labelled pri...
