The wheels revolve round a common horizontal axis. They make 15, 20 and 48 revolutions in a minute respectively. Starting with a certain point on the circumference down wards. After what interval of time will they come together in the same position?
Q1. The wheels revolve round a common horizontal axis. They make 15, 20 and 48 revolutions in a minute respectively. Starting with a certain point on the circumference down wards. After what interval of time will they come together in the same position?
Answer: 1 min
Explanation: Revolution periods are 4 s, 3 s, and 60/48 = 1.25 s; LCM(4, 3, 5/4) = 60 s = 1 minute.