Question
A and B working together, can do a piece of work in
4(1/2) hours. B and C working together can do it in 3 hours. C and A working together can do it in 2(1/4) hours. All of them begin the work at the same time. Find how much time they will take to finish the piece of work?Solution
AB = 9/2 BC = 3 CA = 9/4 Efficiency of AB : BC : CA = 2 : 3 : 4 LCM (Total units) = 36 Now, 2(A + B + C) = 2 (2 + 3 + 4) = 18 To finish the work they will take = 36/18 = 2 hours
What is the average number of passengers travelling in general class, sleeper class by both the trains?
If O is the origin and the coordinates of P are (2, 3, −4), then find the equation of the plane passing through P and perpendicular to OP.
After 14 years how many nuclear bombs did America and China had in total?
Suppose that the reliability of a COVID test is specified as follows:
Of people having COVID, 90% of the test detect the disease but 10% go und...
Supporters of Mumbai in the crowd finally is approximately what percent of the initial number of supporters of Pune in the beginning at 8.00 pm?
What is the number of Astronauts who were going to both Mars and Moon only?
How many bombs America buys every year?
What is the total number of girls who participates in Horse Riding in Heritage School and Delhi Public School together?
If the ratio of the cost of a ticket of general class to that of first class is 2 :3, then find the ratio of the revenue earned from general class and...
The number of passengers travelling in sleeper class of train Q is approximately what percent of the number of passengers of both train P and train Q to...
Relevant for Exams:
