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A man covers half of his journey by train 50 km/hr, half of the remainder by bus at 25 km/hr, and the rest by cycle at 5 km/hr. Find the average speed during the entire journey.

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Important Questions on Average

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In 2010 Sachin Tendulkar, The Indian cricketer, scored 900 runs for his country at an average of 30, in 2011, he scored an average of 30.65, in 2012, 1300 runs at an average of 32.50 and in 2013, 1100 runs at an average of 35.49. What was his county average for the four years?
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The average of 10 men is decreased by 5 kg, when one of them weighing 100 kg is replaced by another person. The new person is again replaced by another person, whose weight is 10 kg lower than the person he replaced. What is overall change in the average due to this dual changes ?
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Find the average weight of four packets, if it is known that the weight of the first packet is 20 kgand the weights of the second, third and fourth packets' each is defined by f(x)=x2-25×x2 where x=10 .
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There are five boxes in a box hold. The weight of the first box is 40 kg and the weight of the second box is 50% higher than the weight of the third box, whose weight is 25% higher than the first boxes' weight. The fourth box at 150 kg is 50% heavier than the fifth box. Find the difference in the average weight of the four heaviest boxes and the four lightest boxes.
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There are five boxes in a box hold. The weight of the first box is 40 kg and the weight of the second box is 50% higher than the weight of the third box, whose weight is 25% higher than the first boxes' weight. The fourth box at 150 kg is 50% heavier than the fifth box. Find the difference in the average weight of the heaviest three and the lightest three.
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20 persons went to a hotel for a combined dinner party. 15 of them  spent 90 each on their dinner and rest spent 30 more than the average expenditure of all the 20. What was  the total money spent  ( in  ) by them?
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CAT
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There were 30 students in a hostel. Due the admission of 20  new students, the expenses of the mess increases by 1600  per day while the average expenditure per head diminished by 8. What was the original expenditure (in ) of the mess?
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The average price of 3 precious diamond studded platinum thrones is ₹97610498312. If their prices are in the ratio 4:7:9. The price of the cheapest is