Question
What is the term for the continued presence of sound in a
hall caused by repeated wall reflections?Solution
When sound is produced in a large hall, it can persist due to multiple reflections off the walls, ceiling, and floor. This lingering effect is called reverberation. To minimize it, surfaces are often treated with sound-absorbing materials like drapes, rough plaster, or fiberboard.
Before 8 years ago, the ratio of age of anil and Sunil is 5:7, after 6 years from now the ratio of their ages become 7:9, find the sum of present age of...
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A’s age is the fourth part of his father’s age. After 8 years, the age of A’s father will be twice the age of B. If B’s 7th birthday is celebrat...
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Amit age after 10 years will be 3 times his age 4 years back. What is the present age of Amit?
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The ages of A, B and C together are 54 years. B is twice as old as A and C is 6 years older than A. What is the difference between ages of B and C?
7 years ago, the age ratio between ‘M’ and ‘N’ was 4:5. Present average age of ‘M’ and ‘O’ is 70 years. Determine the current age of ‘...
