Question
Two trains of lengths 150 m and 200 m are running in
opposite directions at speeds of 54 km/h and 72 km/h respectively. In how many seconds will they completely cross each other?Solution
Convert speeds to m/s: 54 km/h = 54 × 5/18 = 15 m/s 72 km/h = 72 × 5/18 = 20 m/s Relative speed (opposite directions) = 15 + 20 = 35 m/s Distance to be covered = 150 + 200 = 350 m Time = distance / speed = 350 / 35 = 10 s Answer: 10 seconds.
Binny is 20% more efficient than Ankush, while Ankush is 50% more efficient than Raju. If the three of them—Ankush, Binny, and ...
A can do a piece of work in 12 days, while B alone can do it in 18 days. They work together for 6 days and the rest of the work is completed by C...
A can do a piece of work in 12 days, while B alone can do it in 18 days. They work together for 6 days and the rest of the work is completed by C in 4 d...
A can complete a work in 20 days and B can complete it in 30 days. They work together for 6 days, then B leaves. In how many total days will the work be...
A can finish a piece of work in 12 days and B can finish it in 20 days. If they work together, in how many days will they finish the work?
A, B and C are hired at Rs 1050 to do a piece of work. A and B together complete 19/23 part of the work. And B and C together complete 8/23 of the work....
5 girls can do a piece of work in 9 days, 4 boys can do the same piece of work in 8 days, 6 men do the same piece of work in 2 days and 4 women can do t...
20 women can complete a task in 10 days by working 6 hours per day. How many women are required to complete the task in 5 days by working 8 hours per day?
30 men can complete a piece of work in 11 days. 15 men started the same work and worked for 8 days, and then joined by ‘x’ more men such that the re...
Atul, Qureshi, and Chintu can individually complete a certain task in 27 days, 30 days, and 36 days, respectively. They all begin working on the task to...
Relevant for Exams:
