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4 years ago, let the age of Ravi = 3x years So, age of Ravi’s sister = (4/3) × 3x = 4x years 4 years hence from now, age of Ravi = (3x + 8) years So, age of Ravi’s mother = (3x + 8) × (5/2) = (15x + 40)/2 = 7.5x + 20 10 years hence from now: Ravi’s sister = 4x + 14 Ravi’s mother = (7.5x + 20) + 6 = 7.5x + 30 ATQ: 4x + 14 = (3/5) × (7.5x + 30) ⇒ 5(4x + 14) = 3(7.5x + 30) ⇒ 20x + 70 = 22.5x + 90 ⇒ 2.5x = 20 ⇒ x = 8 So, present age of Ravi’s mother = 7.5x + 20 – 4 = 7.5 × 8 + 16 = 60 + 16 = 76 years
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5 positive numbers are written on a piece of paper. Sum of first 3 numbers is 55 and ratio of the 4th and the 5th number is 2:3. If difference between t...
5 positive numbers are written on a piece of paper. Sum of first 3 numbers is 55 and ratio of the 4th and the 5th number is 2:3. If difference between t...
The average of ten positive numbers is calculated as 56. On observing, it was found that two numbers 64 and 32 are wrongly interpreted as 76 and 52, res...
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Virat Kohli's strike rate after facing 'b' balls is 120. In the subsequent 15 balls, he scores an additional 39 runs, leading to ...
An English-based company has 625 men and 625 female employees in a collaborative project. The average attendance of all employees is 74 calls per day. O...
