Question
In a circle, the length of a chord is 20 cm, and the
perpendicular from the center to the chord divides it into two equal parts. If the distance from the center to the chord is 12 cm, find the radius of the circle.Solution
Let the radius of the circle be r. The half-length of the chord is 20/2 = 10 cm, and the distance from the center to the chord is 12 cm. Using Pythagoras' theorem: r² = 10² + 12² r² = 100 + 144 r² = 244 r = √244 ≈ 15.6 cm Correct option: A) 15.6 cm
What should come in place of (?) question mark in the given number series.
81, 73, 66, 60, 55, ?
14 6 4 4 ? 48
...What should come in place of (?) question mark in the following number series.
5, 11, 23, 47, 95, ?
In each of the following number series, one term is missing. Find the missing term.
1, 4, 9, 16, 25, ?
What will come in place of the question mark (?) in the following series?
4, 11, 32, 95, 284, 851, ?
156, 182, 210, 240, 272, ?
31    32      35      ?      47       56
...What should come in place of (?) question mark in the following number series.
1, 2, 6, 24, 120, ?
What value should come in the place of (?) in the following number series?
71, 72, 76, 103, ?, 244254, ?, 1022, 1150, 1214, 1246
