Question
The lengths of three medians in a triangles are 30 cm,
40 cm, 50 cm. What is the area of that traingle (in cm 2 )?Solution
Here s = (a+ b+ c )/2 = (30 + 40 + 50) /2 = 120/2 = 60 cm If a, b & c are medians of any triangle , then area of the triangle = 4/3 √(s(s - a)(s - b)(s - c)) = 4/3 √(60(60 - 30)(60 - 40)(60 - 50)) = 4/3 √(60 × 30 × 20 × 10) = (4/3) × 600 = 800 cm²
- 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 value should come in place of question mark (?) in the following question. (You need not to calcualte the exact value)
?/647 = 226/ ?
- 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.)
√92.10 + √256.30 + 60.78% of (420.90 + 19.36% of 140.25) = ?
- What approximate value will come in place of the question mark (?) in the following question? (Note: You are not expected to calculate the exactvalue.)
- What approximate value will come in place of the question mark (?) in the following question? (Note: You are not expected to calculate the exactvalue.)
The interest received by investing Rs. 1200 for 2 years at compound interest of 20% p.a., compounded annually, was re-invested for 3 years at simple int...
- 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.)
1924.87 + ? – 1805.92 = 1623.68 – 1417.34
159.98% of 4820 + 90.33% of 2840 = ? + 114.99% of 1980