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2 .The angle of elevation of a cloud from a point h meters above the surf ace of a lake i s 30° and the angle of depression of its reflection is 60°. Then the height of the cloud above the surface of the lake is –
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3 .The product of two numbers is 24 times the difference of these two numbers. If the sum of these numbers is 14, find the larger number
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4 .
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5 .What percent of students from institute D have come out to be successful out of the total enrolled from this institute ?
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6 .What i s t he approxi mate perc entage of students successful to enrolled from institute A ?
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7 .The HCF of 0.54, 1.8 and 7.2 is –
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8 .A student bought 4 books for ` 120 from one book shop and 6 books for ` 150 from another. The average price (in rupees) was –
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9 .A and B invest in a business in the ratio 3 : 2. If 5% of the total profit goes to charity and A's share is ` 855, the total profit (in rupees) is –
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10 .The radi i of two concentric circles are 17 cm and 10 cm respectively. A straight line ABCD intersects the larger circle at the point A and D and intersects the smaller circle at the point B and C. If BC = 12 cm, then the length of AD (in cm) is –
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