Five bells first begin to toll together and then at intervals of 3 s, 5s, 7s, 8s and 10 s. Find after what interval they will gain toll together?A12 minutesB15 minutesC8 minutesD14 minutesAnswer: D. 14 minutes Read Explanation: Required time interval =LCM of (3, 5, 7,8 and 10) = 840 second = 14 minutesRead more in App