Advertisements
Advertisements
प्रश्न
My younger sister's age today is 3 times, what it will be 3 years from now minus 3 times what her age was 3 years ago. Find her present age.
Advertisements
उत्तर
Let the age of my younger sister be x yr.
Then, her age after 3 yr = (x + 3) yr
Also, her age 3 yr ago = (x – 3) yr
It is given that her present age is 3 times her age after 3 yr minus 3 times her age 3 yr ago
Therefore, we obtain the following equation
x = 3(x + 3) – 3(x – 3)
⇒ 3x + 9 – 3x + 9 ...[Using the distribute property]
⇒ x = 18 yr
Hence, her present age is 18 yr.
APPEARS IN
संबंधित प्रश्न
Set up equation and solve them to find the unknown number in the following case:
If I take three-fourths of a number and add 3 to it, I get 21.
Solve the following riddle:
I am a number,
Tell my identity!
Take me seven times over
And add a fifty!
To reach a triple century
You still need forty!
In a bag there are 5 and 2 rupee coins. If they are equal in number and their worth is ₹ 70, then
There are ______ 5 rupee coins and ______ 2 rupee coins.
In a Mathematics quiz, 30 prizes consisting of 1st and 2nd prizes only are to be given. 1st and 2nd prizes are worth ₹ 2000 and ₹ 1000, respectively. If the total prize money is ₹ 52,000 then show that:
The total value of prizes in terms of x are ______.
In a Mathematics quiz, 30 prizes consisting of 1st and 2nd prizes only are to be given. 1st and 2nd prizes are worth ₹ 2000 and ₹ 1000, respectively. If the total prize money is ₹ 52,000 then show that:
The equation formed is ______.
Mohan is 3 years older than Sohan. The sum of their ages is 43 years.
Subramaniam and Naidu donate some money in a Relief Fund. The amount paid by Naidu is ₹ 125 more than that of Subramaniam. If the total money paid by them is ₹ 975, find the amount of money donated by Subramaniam.
After 25 years, Rama will be 5 times as old as he is now. Find his present age.
In a bag, the number of one rupee coins is three times the number of two rupees coins. If the worth of the coins is ₹ 120, find the number of 1 rupee coins.
A number when divided by 6 gives the quotient 6. What is the number?
