Question
Consider the following statements: 1. A flute of
smaller length produces waves of lower 2. Sound travels in rocks in the form of longitudinal elastic waves Which of the statements given above is/are correct?Solution
The flute is a musical instrument of the woodwind family. A flute of smaller length produces waves of higher frequency. Sound waves travels through medium even through extremely dense medium like rocks in the form of longitudinal waves only. A good example is the shock wave from an Earthquake, which can be heard hundreds of miles away from the epicenter after travelling through rocks in the ground.
The average age of A, B and C is 30 years, while the average age of B, A and D is 20 years. If the ratio of the age of C and D is 5:3, respectively, the...
The current average age of three friends, Aravi, Bipasa, and Chinu, is 24 years. The ratio of Chinu's and Diksha's present ages is 4:5, and Bipasa's cur...
The ratio of A and B present age is 5:3. The product of their ages is 6000. What will be the ratio of their ages after 4 years?
Present ages of P and Q are in the ratio 5:7 respectively. If Qβs age, 11 years hence from now will be 5 times of Pβs age, 5 years ago from now, the...
Seven years ago, 'R' and 'C' had ages in a ratio of 4:3, respectively. After seventeen years, the ratio of 'C' and 'R's ages will be 9:10, respectively....
The ratio of ages of A and B, 2 years ago was 5:2. The sum of present ages of A, B and C is 64 years. If present age of C is equal to sum of present age...
βAβ, βBβ, βCβ, βDβ and βEβ are five friends and their average age is ____ years. At present the age βAβ is half of the age of οΏ½...
There are four people P, Q, R and S. R and P are the oldest and youngest among them. Q is older than S. The present age of R is double the present age o...
The average age of (x + 4) students is 14 years. When a tutor aged 30 years is included, the average increases by 1 year. Find x% of 900.
Present ages of 'A' and 'B' are in the ratio 3:5, respectively. If B's age, 11 years hence from now will be 5 times of A's age, 18 years ago from now, t...
Relevant for Exams:
