Question
The outer radius of a hollow metallic spherical ball is
12 cm while the thickness of the metal used to make it is 6 cm. Find the volume of the metal used in making this ball.Solution
Inner radius of the ball= (12-6) =6cm Required volume= 4π/3 (12³ -6³) =4π/3(1728-216) = =4π/3 ×1512=2016π
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HCE, MHJ, ?, TOQ, VQS, WRT
Select the letter-cluster from among the given options that can replace the question mark (?) in the following series.
DI, GO, LU, OA, TG, ?
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BIY, D3W, ?, H7S, J9Q
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First row - 4, 6, 13
Second row - 9,...
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Three of the following pairs of letters follow a certain rule/logic/relation and hence are alike in a certain way. Select the incongruous one from the g...
If + means −, − means ×, × means ÷ and ÷ means +, then what will come in place of the question mark (?) in the following equation?
81 × ...