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Earn 100

40 men could have finished the whole project in 28 days but due to the inclusion of a few more men, work got done in 3/4 of the time. Find out how many more men were included (in whole numbers).

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Important Questions on Ratio, Proportion and Variation

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Mr AM, the magnanimous cashier at XYZ Ltd., while distributing salary, adds whatever money is needed to make the sum a multiple of 50. He adds 10 and 40 to A's and B's salary respectively and then he realises that the salaries of A, B and C are now in the ratio 4:5:7. The salary of C could be
 
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A mother divided an amount of  61,000 between her two daughters aged 18 years and 16 years respectively and deposited their shares in a bond. If the interest rate is 20% compounded annually and if each received the same amount as the other when she attained the age of 20 years, their shares are:

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The volume of a pyramid varies jointly as its height and the area of its base and when the area of the base is 60 square dm and the height 14 dm, the volume is 280 cubic dm. What is the area of the base of a pyramid whose volume is 390 cubic dm and whose height is 26 dm?
 
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The expenses of an all boys' institute are partly constant and partly vary as the number of boys. The expenses were 10000for 150 boys and 8400
for 120 boys. What will the expenses be when there are 330 boys?
 
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The distance of the horizon at sea varies as the square root of the height of the eye above sea-level. When the distance is 14.4 km, the height of the eye is 18 metres. Find, in kilometres, the distance when the height of the eye is 8 metres.
 
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A mixture of cement, sand and gravel in the ratio of 1:2:4 by volume is required. A person wishes to measure out quantities by weight. He finds that the weight of one cubic foot of cement is 94 kg, of sand 100 kg and gravel 110 kg. What should be the ratio of cement, sand and gravel by weight in order to give a proper mixture?
 
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In 2006, Raveendra was allotted 650 shares of Sun Systems Ltd in the initial public offer, at the face value of 10 per share. In 2007, Sun Systems declared a bonus at the rate of 3:13. In 2008, the company again declared a bonus at the rate of 2:4. In 2009, the company declared a dividend of 12.5%. What is the ratio of the dividend and the initial investment of Raveendra in 2009?
 
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The ratio of metal '1' and 'metal '2' in Alloy 'A' is 3:4. In Alloy 'B' same metals are mixed in the ratio 5:8. If 26 kg of Alloy 'B' and 14 kg of Alloy 'A' are mixed then find out the ratio of metal 1' and 'metal 2 in the new Alloy -?