if y/x = 1/3 and x + 2y =10, then x is-
A
2
B
3
C
4
D
6
Correct Answer: 6
Hints: y/x = 1/3 3y = x এবং, 3y + 2y = 10 5y = 10 y = 2 x = 3y = 3 × 2 = 6