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A bus travels with a speed of 10 Km/h in the first 15 Minutes, goes 5 Km in the next 15 Minutes, 15 Km in the next 15 minutes, 10 Km in the next 15 Minutes. What is the average speed of the bus in kilometre per hour for the journey described?

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Important Questions on Average

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With an average speed of 25 Km/hr, a train reaches its destination in time. If it goes at an average speed of 20 Km/hr, it gets late by 1 an hour. Find the length of the total journey.
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In the month of the January of a certain year, the average daily expenditure of an organisation was 60. For the first 15 days of the month, the average of daily expenditure was 80 and for the last 17 days, 50. Find the amount spent by the organisation on the 15thof the month.  
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One-fifth of the certain journey is covered at the rate of 20 Km/h, one-fourth at the rate of 50 Km/h, and the rest at 55 Km/h. Find the average speed for the whole journey.
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A batsman makes a score of 40 runs in the 5th innings and thus increases his average by 4. Find the possible value of the new average.
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Aman can type a sheet in 10 minutes, Baman in 20 minutes and Chaman in 30 minutes. The average numbers of sheet typed per hour per typist for all three typist is.
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Find the average increase rate (per annum) if the increase in the population in the first year is 10% and that in the second year is 20%.
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The average income of a person for the first 5 days of a month is  20, for the next 10 day s it is  24 for the next 10 days it it  30 and for the remaining days of the month, it is  10. Find the average income (in ) per day.
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In hotel clarks, rooms are numbered from 101 to 150 on the first floor, 201 to 240 on the second floor and 316 to 355 on the third floor. In the month of May 2018, the room occupancy was 50% on the first floor, 50% on the second floor and 30% on the third floor. If it is also known that the room charges are  2000 1000 and  1500 on each of the floors, then find the average income per room (in ) for the month May 2017.