Question
In the figure P is a point which is 12 cm away from the
centre of the circle O. A line drawn from P point cuts circle at point A and B respectively. If PB = 9 cm, AB = 2 cm Then find out the radius of the circle?Solution
Let the radius of a circle = r cm. PO = 12 cm then, PC = 12 cm - r PC = 12 - r PD = 12 + r ∵ PB = 9 cm AB = 2 cm ∴ then PA = 9 - 2 = 7 cm PA × PB = PC × PD 7 × 9 = (12-r) (12+r) 63 = 144 - r² r² = 144 - 63 = 81 r = √81 r = 9 cm
- Find the value of the expression:
15 + 10 – 6 × [20 + 8 – 2 × (50 – 35)] (? + 180 + 13 × 6) ÷ 20 + 3.5 × 512 (1/3) = 82
√10000 × √8100 - (50)² = √(?) + (80)²
5/2 of 5/6 of 12/5 of 54 % of 5250 = ?
What will come in the place of question mark (?) in the given expression?
(? ÷ 16) = (20 ÷ ?) X 20322 – 182 + 11 × 24 = ?
What will come in the place of question mark (?) in the given expression?
59.92 × 15.11 + √4224 = ? + 144.9Â
What will come in the place of question mark (?) in the given expression?
(87 + 79) X √9 - 298 = ? + √3600
5121.3 × 641.8 ÷ 80.5 = 8?
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