Question
Aman and Rohan start running simultaneously on a
circular track in opposite directions. Aman runs at a speed of 12 km/h while Rohan runs at 18 km/h. After every 10 minutes, their speeds are halved. If the length of the circular track is 1200 m, how many times will Aman and Rohan meet on the track?Solution
Relative speed of Aman and Rohan = 12 + 18 = 30 km/h. After 10 minutes, their speeds are halved, so their effective speed becomes 15 km/h for the next 10 minutes, and so on. The total distance covered in the first 10 minutes = 30 × (10/60) = 5 km. In the next 10 minutes, the relative speed is halved to 15 km/h, so distance = 15 × (10/60) = 2.5 km. This forms a geometric progression where the total distance can be calculated as: Total distance = 5 + 2.5 + 1.25 + ... Sum = 5 / (1 - 1/2) = 10 km. Since each complete meeting corresponds to 1 lap (1200 m or 1.2 km), the number of meetings is: Number of meetings = 10 × 1000 / 1200 = 8.33 ≈ 8 times. Correct Option: d) 8
Recoveries of loans and advances, borrowings, are an example of ________.
Which ecological law states that body form or shape is linear in warm climates and more rounded and compact in cold climates?
Who among the following wrote the Brahmo Covenant, which was a statement of the creed of the Brahmo Samaj and made a list of the duties and obligations...
As of October 2019, how many nuclear power plants are present in India?
In extra-ordinary circumstances a person under detention must be communicated in _____ days, the grounds on which the order has been made.Â
Which government regulatory body oversees the regulation of financial influencers?Â
Which of the following statement is correct about Dhamek stupa?
1. Dhamek Stupa is the most noticeable structure in Sarnath, near Varanasi.
<...The Ministry of Electronics and Information Technology launched the India Semi-conductor Mission in the year ______.Â
Which organisms are classified as Aves?
Who among the following was India's first cricket team captain?
Relevant for Exams:
