A machine in a pepsi factory fills 680 bottles in 5hrs. How many bottles will it fill in 3 hrs?

1 Suppose 6kg of salt contains crystals. How many crystals are there is (i) 7kg of salt (ii) 3.5 kg of salt? 3 Bacteria enlarged 60000 times attains a length of 3cm. What is the length of bacteria if it is enlarged 10000 times only. 4 A bus travels 40kms in 30minutes. If the speed of the bus remains same, how far can it travel in 3 hrs? 5 A contractor estimates that 5 persons could plumb Ravi's house in 8 days. If he uses 6 persons instead of 5, how long should they take to complete the job.