Question
Which of the following types of waves has the smallest
wavelength?Solution
X-rays have the smallest wavelength, which allows them to penetrate various materials and is the reason they are used for imaging purposes.
The age of A is 40% less than that of B. The age of B is 15 years more than the average age of his two friends whose total age is 20 years. Find the dif...
The present age of a father is 5 times the age of his son. In 6 years, the father's age will be 4 times the age of his son. How many years ago was the f...
Four years ago, the ratio of ages of a brother and sister was 5:6 respectively. 3 years from now, the age of the sister will be twice that of the brothe...
A's age : B's age is 4 : 3. After 6 years, A will be 26 years. What is B's present age?
Nine years ago, the ratio of ages of Asha and Usha was 2:3, respectively. Seven years hence, the ratio of ages of Vimal and Usha will be 5:6, respective...
The difference between the ages of two daughters is 8 years. 12 years ago, the elder one was twice as old as the younger one. The present age of the el...
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....
Rohit's current age matches Rahul's age from 5 years earlier. If the age of Rohit 10 years from now will be the same as Rahul's age 5 years from now, wh...
A is 3 years older than B while C is 5 years younger than B. The ratio of age of A, 6 years hence and age of B, 3 years ago is 4:3. What was age of C, 1...
Anil’s present age is 3/8 of his father’s present age. Anil’s sister is 4 years older than him. The ratio between the present age of Anil’s fath...
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