Question
The total energy of revolving electron in an
atomÂSolution
The correct answer is C
The present ages of 'Aman' and 'Ravi' are in the ratio 5:6. Two years from now, Aman’s age will be 25% less than Ravi’s age. Find Aman’s current a...
A man is 6 times as old as his daughter. After 4 years, he will be 4 times as old as she will be. After how many more years will the man be 3 times as o...
The ratio of A's age to B's age after 18 years will be 5:6. Seven years ago, the ratio of their ages was 5:7. Find the present average age of A and B.
Present average age of 4 friends: ‘A’, ‘B’, ‘C’ and ‘D’ is 36 years. If their ages are in the arithmetic progression in the same order a...
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The ratio of A and B present age is 7:3. The product of their ages is 8400. What will be the ratio of their ages after 4 years?
The sum of the ages of P, Q, and R is 120 years. If P is 10 years older than Q and R is 5 years younger than P, what is the age of Q?
Sum of the present ages of Gaurav and Shubham is 100. Age of Gaurav four years ago was twice the age of Shubham six years ago. Find the square root of a...
- The average age of Neha and her uncle at present is 40 years. Neha's age 5 years from now will be one-fourth of the present age of her uncle. What is the c...
Ratio of present age of 'A' to that of 'B' is 4:7. If the age of 'B' three years hence from now will be 31 years, then after how many years, the ratio o...
