Question
The sum of the total surface areas of two cubes is 1926
cm2. If the product of the length of their edges is 136 cm2, then find the difference (in cm) between the lengths of their edges.Solution
Let the length of the edges of the two cubes be ‘a’ cm and ‘b’ cm, respectively According to the question, 6a2 + 6b2 = 1926 Or, a2 + b2 = 1926/6 = 321 And, ab = 136 Using the formula,  x2 + y2 = (x – y)2 + 2xy 321 = (a – b)2 + 2 × 136 Or, (a – b)2 = 321 – 272 Or, (a – b)2 = 49 Or, a – b = ±7 So desired difference = 7 cmÂ
Which of the following is not correct about ARR method?
Which of the following schemes is related to the improvement of Rural Infrastructure?
What is the Number of RRBs functional now?
Which of the following bank has signed an agreement with National Housing Bank (NHB) for implementation of Rural Housing Interest Subsidy scheme?
The new ₹100 denomination banknotes in the Mahatma Gandhi (New) Series feature which motif on their reverse side?
The Kailasanathar temple at Kanchipuram was built during the rule of:
How much equity did IREDA get approval to raise via the Qualified Institutions Placement (QIP) route?
Which gland disapear during old age?
Exercise Varuna is a collaborative naval exercise between India and which country?
Which of the following is/are Correctly matched: