Question
A circle has a radius of 21 cm, and a sector makes an
angle of 60° at the center. Find the area of the sector and the length of the arc (use π = 22/7).Solution
Area of sector = (θ / 360) * π * r² = (60 / 360) * (22/7) * 21 * 21 = (1/6) * 1386 = 231 cm² Length of arc = (θ / 360) * 2 * π * r = (60 / 360) * 2 * (22/7) * 21 = (1/6) * 132 = 22 cm Correct Answer: a) Area = 231 cm², Arc = 22 cm
95.001% of 8219.99 - 4/9 % of 5399.98 + 109.99 = ?Â
25.05% of 220.05 – 10.15% of 119.99 × 2.02 = ?
What approximate value should come in the place of (?) in the following questions?
∛(92.8 + √1025) * ? = 16.06% of 750
What approximate value should come in the place of (?) in the following questions?
?3 -18.32 * 40.24 ÷ √399 = 200.79 + 105.78
...1080.04 – 250.18 + 199.98 ÷ 20.06 = ?
What approximate value should come in the place of (?) in the following questions?
9.9 * [? – (4.9 * √576 ÷ 7.80)] = 950.05
108.31% of (4.9/9.012) of ? = 23.9% of 2499.9
22.11 × 4.98 + 23.03 × 5.12 – 32.95 + 96.9 × 5.02 =?
(√8648 ×7) ÷ (3.9 ×5.99) = ?
6527.83 - 4891.21 + 7423.46 + ? = 14520.34
