In a temple, during festival season there is a traditional belief that if 200 people gather together holding one lamp per person good things will happen in near future to the city. The condition is that all must not light the lamp at once. Initially the guruji in the temple will light his lamp and look for someone in the rest of 199 people and light his/her lamp. This person and guruji will now again light the lamp of two other people and this goes on. If it takes exactly 30 seconds to find another person and light the lamp from guruji till the end, how long will it take for all the 200 lamps to be lit?
