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.
The ratio between the number of books and pencils is 8:5 and the ratio of cost of per book and pencil is 6:5 then find the percentage by which total cos...
There are 108 rupees in a box which contains coins of 1 rupee, 50 paise, and 25 paise. If the number of 50 paise coins is 3 times the number of 25 paise...
An amount is distributed among P, Q, R, and S in the ratio 12:8:5:6 respectively. If the amount received by Q is Rs. 1,600 , then find the amount receiv...
If the income of a family decrease by 5% and expenditure decrease by 7%, and its saving increases by 3%. Find the ratio of income and expenditure of tha...
‘X’, ‘Y’ and ‘Z’ rented a taxi for a trip. The taxi driver charges a fixed amount per kilometer. If ‘X’, ‘Y’ and ‘Z’ travelled ...
Find the fourth proportion of 3, 7 and 15.
The ratio of zinc and copper in a brass pieces is 3:4. How much zinc will be there in 140 kg of such a piece?
Find the third proportional to 13 and 39?
Ratio of monthly income to monthly expenditure of A is 11:9, respectively and monthly savings of A is Rs. 2880. Find the monthly income of A.
The ratio of investment of A and B is 2 : 5 and that of B and C is 3 : 7. Find the investment of B if sum of investment of A, B and C is Rs. 33600.
