Question
If 3x + (1/3x) = 9 then find 27x³ + (1/27x³ ) =
?Solution
If 3x + (1/3x) = N then 27x³ + (1/27x³) = N 3 -3N = 9 3- 3 x 9 = 729 - 27 = 702 ` `
Ratio of present ages of A and B is 5:7, respectively. C who is 9 years older than A will become 36 years older after 12 years. Find the present age of B.
Ratio between the age of Varsha, 8 years ago from now and age of Nidhi, 6 years hence from now, will be 9:16, respectively.
Age of Priya, 3 years...A is 8 years older than B who is four times as old as C. The total sum of the ages of A, B and C is 35. How old is B?
10 years ago, the ratio of the ages of Maya and Neil was 4:3. The present age of Jake is 10 years more than one-fourth of Neil’s present age. Find the...
The Average age of 25 pupils in a class is ‘y’ years. If their principal, aged 50 years, joins them, the average rises by 1 year. Find the value of ...
There are 6 children in a family. The average age of the children is 14 years. If the present age of their mother and father is added, the average age o...
The ratio of age of A and his son is 5:1. If the difference of their ages 6 years ago is 24, then find the sum of the ages of A and his son together 11 ...
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...
B is 3 years older than A and A is 7 years older than C. If the sum of the age of A and C is 27 years, then find the sum of the ages of all three.
The ratio of the present ages of father and his son is 9:5. The product of their ages 3 years ago was 33 times of his son’s age that year. What wa...
Relevant for Exams:
