Part C - Elementary Mathematics
One third part of a certain journey is covered at the speed of 22 km/hr, one fourth part at the speed of 33 km/hr and the rest part at the speed of 55 km/hr. What will be the average speed for the whole journey?
R and S can complete a work in 15 days and 60 days respectively. They work every alternate day with S starting the first day and R starting the first day. In how many days will the total work be completed?