Question
The present age of Raj is 10% less than that of Pranay.
Pranay is two years younger than Queen. Ten years ago, the average of the ages of Queen and Raj is 29 years. If Pranay is 8 years older than Tanu, then find out the age of Tanu five years ago.Solution
The present age of Raj is 10% less than that of Pranay. Let’s assume the present age of Pranay is 10y. present age of Raj = (100-10)% of 10y = 90% of 10y = 9y Pranay is two years younger than Queen. 10y = (present age of Queen) - 2 present age of Queen = (10y+2) Ten years ago, the average of the ages of Queen and Raj is 29 years. (10y+2)-10+9y-10 = 29x2 19y-18 = 58 19y = 58+18 = 76 y = 4 If Pranay is 8 years older than Tanu. 10y = (present age of Tanu) + 8 present age of Tanu = (10y-8) Age of Tanu five years ago = (10y-8)-5 = 10y-13 Put the value of ‘y’. = 10x4-13 = 40-13 = 27 years
What is the nature of the pH of milk?
When chlorination of dry slaked lime takes place, _________ will form as the main product.
What is the simplest hydrocarbon?
Which of the following statement regarding Rutherford nuclear model is NOT correct?
Which of the following is an example of a colloidal solution?
If water smells bad, then that odor can be removed by adding:
Magnesium has atomic number as 12. Find out its valiancy.
Which of the following elements is a member of the actinoid series?
Which law governs the behavior of ideal gases?
Acid rain is caused due to pollution of the atmosphere by: