যদি \(\frac{y}{x} = \frac{1}{3}\) এবং x+2y = 10 হয়,তাহলে x = কত?

যদি \(\frac{y}{x} = \frac{1}{3}\) এবং x+2y = 10 হয়,তাহলে x = কত?

A ৫

B ৬

C ৭

D ৮

Solution

Correct Answer: Option B

Given that,

y/x=1/3

=>x=3y

then, x+2y=10

=> 3y + 2y =10

=> 5y = 10

y=2

so, x=3y

=>x = 3 * 2 [since, y=2]

x=6