Question
Train P starts from Lucknow to Dehradun at 11:55 am with
an average speed of 15 m/s. Train Q starts from Dehradun to Lucknow at 1:35 pm with an average speed of 10 m/s. At what time the two trains will meet each other if the distance between Lucknow and Dehradun is 450 Km.Solution
Speed of train P = 15 × 18/5 = 54 Km/h Speed of train Q = 10 × 18/5 = 36 Km/h Distance travelled by train P till 1:35 pm = 54 × 5/3 = 90 Km Relative speed of trains = 54 + 36 = 90 Km/h Remaining distance to be travelled after 1:35 pm = 450 – 90 = 360 Km Time taken to cover 360 Km = 360/90 = 4 hours So the two trains will meet each other at 1:35 + 4 = 5:35 pm
A man spends 20% and 12% of his monthly salary on rent and transportation, respectively. Out of the remaining money, he spends 30% on food and 45% on en...
Meenu spent 20% of the salary on entertainment and 10% on makeup. She spent 20% of the remaining on the food and 50% of the remaining invested in mutual...
In a ward member election, a candidates secure 67% of the votes and is elected by majority of 5100 votes. The total number of votes polled is?
A 16-liter salt solution contains 6% salt. If 4 liters of water are evaporated by boiling the solution, what is the new percentage of salt in the remain...
In a class of 40 students and 8 teachers, each student got gifts that were 20% of total number of students and each teacher got gifts that were 15% of t...
When a train starts it is carrying 320 passengers. At the first station 12 passengers got down and 42 passengers get into the train. At the second stati...
A shopkeeper sells two articles for Rs.3000 each. On one, he gains 25%, and on the other, he loses 20%. What is the overall percentage gain or loss?
8.5 can be expressed in terms of percentage as:
- Anita spends 18% of her monthly income on rent and 70% of the rest on household expenditure. If she saves Rs. 1,890, then find her monthly income.
Seven years ago, the ratio of the ages of A and B was 4: 5. Eight years hence, the ratio of the ages of A and B will be 9:10. What is the sum of their p...
Relevant for Exams:
