Question
How many identical spherical
marbles having a diameter of 4 cm can be made by melting a hemisphere of radius 28 cm? (Use π = 22/7)Solution
ATQ,
Volume of hemisphere = (2/3) × π × radius³ Volume of sphere = (4/3) × π × radius³ Let the required number of spheres be 'N'. So, N × (4/3) × (22/7) × (4/2)³ = (2/3) × (22/7) × 28³ Or, 'N' = 1372
23, 28, 38, 49, 62, ?
12, 16, ?, 48, 76, 112
28, 43, 73, 118, ?, 253
What will come in place of the question mark (?) in the following series?
4, 8, 24, ?, 480, 2880
What value should come in the place of (?) in the following number series?
15, 21, ?, 41.16, 57.624
11Â Â Â Â Â Â Â Â Â Â 22.5Â Â Â Â Â Â Â 47Â Â Â Â Â Â Â Â Â Â 102Â Â Â Â Â Â Â Â 236Â Â Â Â Â Â Â Â ?
...64, 32, 48, 120, 420, ?
18, 30, 54, 90, 138, ?
What will come in place of the question mark (?) in the following series?
35, 38, 46, ?, 85, 120
What will come in place of the question mark (?) in the following series?
68, 76, 61, 85, ?, 98
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