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Let the length of the edges of the two cubes be ‘a’ cm and ‘b’ cm, respectively According to the question, 6a2 + 6b2 = 1512 Or, a2 + b2 = 1512/6 = 252 And, ab = 113.5 Using the formula, x2 + y2 = (x – y)2 + 2xy 252 = (a – b)2 + 2 × 113.5 Or, (a – b)2 = 252 – 227 Or, (a – b)2 = 25 Or, a – b = ±5 So desired difference = 5 cm
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I). p 2 – 5p – 126 = 0
II). q 2 + 9q – 90 = 0
Income of A is twice the income of B. B and A spend 55% and 65% respectively of their incomes. Find the savings of A, if B saves Rs. 18000 in a month.
28, 52, 84, 124, 172, ?.
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A triangle has sides 7 cm, 24 cm, and 25 cm. A circle is inscribed in the triangle. What is the area of the triangle not covered by the circle?