Question
Train ‘A’ running at a speed of 19.8 km/hr. can
cross a standing goods train 4 times its length in 40 seconds. Find the time taken by 300 meters long train ‘B’ which is coming from the opposite direction of train ‘A’, with a speed of 9 m/s, to cross train ‘A’.Solution
Let the length of train ‘A’ be ‘x’ meters. Therefore, length of the goods train = ‘4x’ meters Speed of train ‘A’ = 19.8 × (5/18) = 5.5 m/s According to the question, 4x + x = 5.5 × 40 => 5x = 220 => x = 44 Therefore, time taken by train ‘B’ to cross train ‘A’ = {(44 + 300)/ (5.5 + 9)} = 23.7 seconds
There are three content creators, 'P,' 'Q,' and 'R.' Creator 'P' can produce 32 short videos in 8 minutes, creator 'Q' takes 6 minutes to create 36 shor...
'C' can complete a work in 18 days whereas 'D' can do the same work in 30 days.They started working together but 'C' worked with 60% of his efficiency w...
- Aman can finish a task in 9 days while Rohan can finish it in 18 days. They together earn Rs. 27,000 for the task. What is Rohan’s share?
X, Y and E can do piece of work in 24, 30 and 40 days respectively. All three began to work together but X and Y left 6 and 8 days respectively before c...
A buffalo alone can plough field ‘A’ in 50 days. A Bull alone can plough the field ‘A’ in 75 days. Find the number of days taken by 1 bulls and ...
- ‘P’ and ‘Q’ together can finish a task in 15 days while ‘Q’ alone can do it in 25 days. If the ratio of efficiencies of ‘P’ and ‘R’ is ...
A can complete a work in 18 days. B takes 6 days less than A to complete the same work. In how many days can both of them together complete 50% of the w...
P and Q can complete a piece of work individually in 12 days and 20 days, respectively. They start working together, but after 6 days, Q leaves the work...
- 8 men working for 5 hours a day can complete a work in 28 days. If 16 women are employed to work, then find how many hours a day they have to work to compl...
Amin, Basha and Cheez can do a piece of work in 90, 40 and 12 days respectively. But they decide. That a single person will work in a day and receive Rs...
Relevant for Exams:
