Question
Two sound waves have frequencies 256 Hz and 260 Hz. The
beat frequency is:Solution
Beat frequency = difference = ∣260−256∣ = 4 Hz.
Monthly savings of ‘Q’ is 25% more than that of ‘P’ and is 44% less than monthly income of ‘P’. Monthly expenditure of ‘Q’ is Rs. 5150 a...
The ratio of the speeds of Train A, Train B, and Train C is 3:5:7 respectively. Train D moves 6 km/hr slower than Train B. If the difference between Tra...
Determine the mean proportion of 40 and 19.6
- If ‘A’, ‘B’ and ‘C’ are in proportion in the given order while ‘A’ = 15 and ‘B’ = 30, then find the value of ‘C’.
If x+3, x-2, 6 and 5 are in proportion then find the mean proportional to x and 9x2.
The ratio of the pocket money of two persons ‘X’ and ‘Y’ is 7:4, respectively. ‘X’ spends 60% of his pocket money while ‘Y’ spends 50% o...
An amount is distributed among L, M, N, and O in the ratio 5:6:3:8 respectively. If the amount received by M is Rs. 1,800 , then find the amount receive...
- In a company, 60% of the number of girls is equal to two - third of the total number of boys. When 40 new girls joined the company, then 25% of the number ...
An integer 'p' is added to each of 11, 17, 29 and 41 so that the resulting numbers will be in proportion in given order only. Find the value of '(p + 4)'.
In a class, the ratio of number of boys to number of girls is 7:5. If 1 boy joined the class and 1 girl left the class, then the ratio becomes 5:3. Find...
