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2 .20 men can do a piece of work in 18 days. They worked together for 3 days, then 5 men joined them. In how many more days is the work completed ?
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3 .The height of a triangle is increased by 10%. To retain the original area of the triangle, its corresponding base must be decreased by ?
A. 9$1\over8$%
B. 9$1\over7$%
C. 9$1\over11$%
D. 10%
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4 .'O' is the circumcentre of triangle ABC. If ∠BAC = 50° then ∠OBC is
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5 .A man bought a watch at 25% discount on the original price. He got ` 40 more than the original price by selling it at 140% of the price at which he bought. The price of buying the watch was ?
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6 .Two circles of radii 10 cm and 8 cm intersect and the length of the common chord is 12 cm. Then the di stance between their centres is :—
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7 .
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8 .The approximate percentage increase in quantity from 1997 to 1998 was ?
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9 .The difference between the bags exported in 1999 and 2000 was ?
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10 .Value per bag was minimum in the year ?
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