Antriksha fires two bullets from the same place at an interval of 6 minutes but Bhagwat sitting in a car approaching the place of firing hears the second fire 5 minute 32 seconds after the first firing. What is the speed of car, if the speed of sound is 322 m/s?
in a 2 km race, if ravi gives suraj a start of 120 m, ravi wins by 70 sec but if ravi gives suraj a start of 120 sec in same race, suraj wins by 100 m. what is time taken by ravi to complete the race?
In what time would a cistern be filled by three pipes whose diameter are 1 cm, 4/3 cm, 2 cm, running together, when the largest alone will fill it in 61 min. , the amount of water flowing in by each pipe being proportional to the square of its diameter?