a) In a factory production line, 11 operators can assemble 43 product X within 105 minutes.

How long it will take for 55 operators to assemble 215 products?

b) In the assembly line, they have a stock80tyres. It is expected that they can assemble a total of28bicycles and tricycleson that day.How manytricyclescan be assembled on that day?

c) To paint a building, it is expected that it can be completed by 2 painters in 44 days.

After 6 days the job started, additional 7 painter join the team to complete the job. Now, how many days can they finish the job (from that day)?

(Please answer in 1 decimal point)