# The age of Sachin before Y years was X years, then his age after 4 years will be _______ years.

A. $X + Y + 4$

B. $X - Y - 4$

C. $Y - X + 4$

D. $X - Y + 4$

Last updated date: 29th Mar 2023

•

Total views: 308.4k

•

Views today: 7.85k

Answer

Verified

308.4k+ views

Hint: Start by taking the person’s present age equal to a variable and then set the other equations on the basis of that. Get at least 2 equations for 2 variables and solve those 2 equations to get the value of the first variable, then put the value of the first variable to any of the equations and obtain the value of the second variable.

Let, the present age of Sachin be $a$ years.

Therefore, before years, the age of Sachin would have been $\left( {a - Y} \right)$ years which is given to be equal to $X$ years.

Therefore, on equating, we get,

\[\left( {a - Y} \right) = X\]

\[a = X + Y\]

Therefore, his present age is \[\left( {X + Y} \right)\] years.

His age after \[4\] years will be present age plus $4$, which is \[\left( {a + 4} \right)\] years,

Age= \[\left( {X + Y + 4} \right)\]

Therefore, Option A is the correct answer

Note: In this type of questions students get confused as X and Y are already given. Here X and Y are constants so assume different variables and solve pairs of linear equations.

Let, the present age of Sachin be $a$ years.

Therefore, before years, the age of Sachin would have been $\left( {a - Y} \right)$ years which is given to be equal to $X$ years.

Therefore, on equating, we get,

\[\left( {a - Y} \right) = X\]

\[a = X + Y\]

Therefore, his present age is \[\left( {X + Y} \right)\] years.

His age after \[4\] years will be present age plus $4$, which is \[\left( {a + 4} \right)\] years,

Age= \[\left( {X + Y + 4} \right)\]

Therefore, Option A is the correct answer

Note: In this type of questions students get confused as X and Y are already given. Here X and Y are constants so assume different variables and solve pairs of linear equations.

Recently Updated Pages

If a spring has a period T and is cut into the n equal class 11 physics CBSE

A planet moves around the sun in nearly circular orbit class 11 physics CBSE

In any triangle AB2 BC4 CA3 and D is the midpoint of class 11 maths JEE_Main

In a Delta ABC 2asin dfracAB+C2 is equal to IIT Screening class 11 maths JEE_Main

If in aDelta ABCangle A 45circ angle C 60circ then class 11 maths JEE_Main

If in a triangle rmABC side a sqrt 3 + 1rmcm and angle class 11 maths JEE_Main

Trending doubts

Difference Between Plant Cell and Animal Cell

Write an application to the principal requesting five class 10 english CBSE

Ray optics is valid when characteristic dimensions class 12 physics CBSE

Give 10 examples for herbs , shrubs , climbers , creepers

Write a letter to the principal requesting him to grant class 10 english CBSE

List out three methods of soil conservation

Epipetalous and syngenesious stamens occur in aSolanaceae class 11 biology CBSE

Change the following sentences into negative and interrogative class 10 english CBSE

A Short Paragraph on our Country India