Question
10 identical solid spherical balls of radius 3 cm are
melted to form a single sphere. In this process 20% of solid is wasted. What is the radius (in cm) of the bigger sphere?Solution
The ratio of A and B present age is 7:3. The product of their ages is 8400. What will be the ratio of their ages after 4 years?
The ratio of present ages of Alice and Bob is 5:7, respectively. Charlie, who is 3 years older than Alice, will become 40 years older after 12 years. Fi...
In a classroom there are 16 boys and 12 girls. Average age of each boy and each girl is 21 years and 17 years respectively. The sum of ages of all the b...
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...
The ratio of the present ages of father and his son is 7:5. The product of their ages 3 years ago was 32 times of his son’s age that year. What was so...
A’s age is the sixth part of his father’s age. After 8 years, the age of A’s father will be twice the age of B. If B’s 6th birth...
Five years from now, the age of Arjun will be 28 years. Six years from now, the ratio of ages of Arjun and Varun will be 4:5 respectively. After how man...
- The present ages of ‘X’ and ‘Y’ are in the ratio 7:9. After 4 years, their ages will be in the ratio 11:13. What was X’s age 6 years before now?
The present age of A is 7/4 times to that of his marriage age. Present age of his brother is 1/4th of his present age. If A was married 36 years ago the...
B is 5 years older than A and A is 8 years older than C. If the sum of the age of A and C is 24 years, then find the sum of the ages of all three.Â
