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An autmobile travelling at 80 km//h has tyres of 75.0 cm diameter. What is the angualr speed of the tyres about their axles ? If the car is brought to stop uniformly in 30 complete turns of the tyres without skidding, what is the magnitude of angular acceleration of the wheels ? How far does the car move during the braking ?

7 people - A, B, C, D, E, F and G stay on a 7 floors building (No body stays on ground floor which is named 0 floor). They are professors of different subjects - Finance, English, Computer, Physics, Marketing, Accounts and Mathematics (but not necessarily in the same order). The professor of Finance stays on either 2nd or 5th floor. There are three floors between the persons who teach English and Finance. And also there are 2 floors between the persons who teach English and Computers. Physics Lecturer stays immediately below the Marketing Lecturer. Accounts Lecturer stays below Mathematics Lecturer (not necessarily immediately below Mathematics Lecturer). Accounts lecturer does not stay on 1st or 2nd floor. How many floors are between Finance Lecturer and English Lecturer ?