Question
In a closed organ pipe, the frequencies of vibration are
in the ratio:Solution
Given: A closed organ pipe Concept: – In a closed organ pipe, only odd harmonics are present – The fundamental frequency is: f₁ = v / 4L , where v = speed of sound, L = length of pipe Allowed frequencies: – First harmonic: f₁ – Third harmonic: f₃ = 3f₁ – Fifth harmonic: f₅ = 5f₁ – Seventh harmonic: f₇ = 7f₁ So, the frequency ratio is: f₁ : f₃ : f₅ : f₇ = 1 : 3 : 5 : 7
Four years ago, ratio of age of A and B was 1:2. Average of present age of A, B and C is 32 years. C is 6 years younger than B. What is the present age ...
The current average age of students in a class is 24 years. What will the average age of the students be in 6 years?
The present age of P is 40% more than that of Q, and the ratio of Q’s age to R’s age is 3:5. Find Q’s age 6 years ago if the oldest among them is ...
Shivani is 6 years younger than Deepika and Deepika is 6 years younger than Mohani. After 6 years the ratio of Shivani’s age and Mohani’s age will b...
B is 4 years older than A and A is 8 years older than C. If the sum of the age of A and C is 22 years, then find the sum of the ages of all three.
The average age of 66(2/3)% of the number of children in a group is 13 years. The average age of all the children in the group is 14.5 years. What is t...
The ratio of age of ‘B’ after 5 years from now and age of ‘C’ 4 years ago from now is 7:4, respectively. The present age of ‘C’ is 50% of th...
When 15 years is subtracted from the present age of A and the obtained result is divided by 4, then the present age of his nephew is obtained. If the pr...
Present ages of 'Ajay' and 'Bheem' are in ratio 5:8, respectively. Five years hence from now, Ajay's age will be 25% less than that of 'Charu'. If prese...
The present ages of Tarun, Varun, and Arun are in the ratio 6:4:5. If Arun’s age after 6 years will be 36 years, find their current average age.
Relevant for Exams:
