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Q) Average age of 6 sons of a family is 8 year. Average age of sons together with their parents is 22 year. If the father is older than the mother by 8 year, the age of mother (in yr) is
Q) Two pipes A and B can separately fill a cistern in 60 min and 75 min pipe at the bottom of the cistern to empty it. If all the three pipes are simultaneously opened, the cistern is full in 50 min. In how much time can the third pipe alone empty the cistern ?
Q) An amount of Rs.1,00,000 is invested in two types of shares. The first yields an interest of 9% per annum and second yields 11% per annum. If the total interest at the end of 1 year is 9¾%, then the amount invested in each share was
Q) A merchant fixed the selling price of this articles at Rs.700 after adding 40% profit to the cost price. As the sale was very low at this price level, he decided to fix the selling price at 10% profit. Find the new selling price.
Q) 36 man can do a piece of work in x days and 48 women in (x+7) days .the ratio of the work done by 5 men to that by 3 women in the same time is 3:1.
Find the value of x .
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