The layer is the upper limit of our atmosphere. It extends from the top of the thermosphere up to 10,000 km (6,200 miles).
The Exosphere layer is the upper limit of our atmosphere. It is made up of helium and hydrogen. Troposphere is the lowest layer of Earth's atmosphere.
The ratio of the present ages of Ram and Ramesh is 3 : 5. After 7 years the ratio of their ages will be 4 : 5. Find the present age of Ramesh.
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...
A person’s present age is 4/5th of the age of his brother. After 10 years, he will be 9/10th of the age of his brother. How old is the brother at ...
Present ages of P and Q are in the ratio 5:8 respectively. If Q’s age, 14 years hence from now will be 4 times of P’s age, 4 years ago from now, the...
A is younger than B by 5 years. If the ratio of A and B ages is 6:7 respectively, then find the age of A.
Present ages of Ram and Raj are in the ratio 6:7, respectively. The ratio of their ages after 12 years will be 9:10. The difference between the ages of ...
The current average age of Aman and Bhanu is 27 years, and the ratio of Bhanu's present age to Chetna's present age is 10:11. If Aman's current age is 2...
B is 5 years older than A and A is 7 years older than C. If the sum of the age of A and C is 21 years, then find the sum of the ages of all three.
The current ratio of the ages of 'Armaan' and 'Bittu' is such that six years from now, it will be 5:4, respectively. Presently, 'Chetna's age exceeds 'B...
In a school there are 20 girls. The average age of the girls is decreased by 2 months when one girl aged 18 years is 8 replaced by a new girl. What is t...
