Question
Find the area of a ring formed by two concentric circles
of radii 14 cm and 7 cm. Take pi = 22/7.Solution
ATQ, Area = pi(R2 - r2) = (22/7)*(142 - 72) 142 = 196, 72 = 49 Difference = 196 - 49 = 147 Area = (22/7)147 = 2221 = 462 cm2
If + means –, – means ×, × means ÷, and ÷ means +, then what will be the value of following expression?
13 – 3 + 15 × 3 ÷ 5 = ?
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Select the option that is related to third letter - cluster in the same way as the second - letter cluster is related to the first letter - cluster.
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If '@' means 'addition', '%' means 'multiplication', '$' means 'division' and '#' means 'subtraction', then find the value of the following expression.<...
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