Question
The sides of a triangle measure 13 cm, 14 cm, and 15 cm.
Find the area of the triangle.Solution
Using Heron’s formula, s = (a + b + c) / 2, where s is the semi-perimeter. s = (13 + 14 + 15) / 2 = 21 cm. Area = √[s(s - a)(s - b)(s - c)] = √[21 * (21 - 13) * (21 - 14) * (21 - 15)] = √[21 * 8 * 7 * 6] = √7056 = 84 cm² Correct Answer: a) 84 cm²
480 ÷ 10 + 18 % of 160 + ? * 9 = 60 * √36
59.978% of 800.315 - 229.95 = ? - 24.95% of 200.15
What approximate value will come in place of the question mark (?) in the following question? (Note: You are not expected to calculate the exact value.)...
20.57 ×28.04 ÷ ? + 254 = 429.06
At a village trade fair a man buys a horse and a camel together for Rs 51,250. He sold the horse at a profit of 25 % and the camel at a loss of 20 %. If...
- What approximate value will come in place of the question mark (?) in the following question? (Note: You are not expected to calculate the exact value.)
What approximate value will come in place of the question mark (?) in the following question? (Note: You are not expected to calculate the exact value.)...
(71.78 × 59.88 ÷ 17.92 ÷ 120.22 × 161.72)% of 32 = ?
(84.92 + 235.17) ÷ (15.93 × 3.89) = ? ÷ 21.02
What approximate value will come in place of the question mark (?) in the following question? (Note: You are not expected to calculate the exact value.)...
