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Start learning 50% faster. Sign in nowThe thickness of the ozone layer is measured in Dobson Units (DU). A Dobson Unit is a measure of the total amount of ozone in a column of air stretching from the Earth's surface to the top of the atmosphere. One Dobson Unit represents a layer of ozone that would be 0.01 millimeters thick under standard temperature and pressure conditions.
In a family a couple has a son and a daughter. The age of the father is four times that of his son and age of her daughter is half of her mother. The wi...
The ratio of Rama’s to Shyama’s age is 1 : 2 and the sum of their age 81 years. What will be the ratio of their ages after 7 years?
The ratio of the present ages of P and Q is 6:5 respectively. If the age of P 10 years hence from now will be 100% more than the age of Q 4 years ago fr...
Shalini is younger than Rashi by 3 years. If the ratio of Shalini and Rashi ages is 4:5 respectively, then find the age of Shalini.
Present ages of 'P' and 'Q' are in ratio 5:6, respectively. If ten years hence from now, age of 'P' will be 25% less than that of 'Q', then find the rat...
The current age ratio of Rahul to Sakshi is 3:2. Additionally, the ratio of Rahul’s age five years ago to Sakshi’s age ten ye...
The ratio of the present age of A to that of B is 7:9. Six years ago the ratio of 1/3 of A’s age at that time and 1/3 of B’s age at that time was 1:...
The average age of A, B and C is 40 years, while the average age of B, A and D is 30 years. If the ratio of the age of C and D is 5:3, respectively, the...
