DRDO Multi tasking staff Model paper 2

Tips & Tricks
Solve the problem by using back substitution method,
Take option A value, put a = 1 and b = 2

(2a3+5b2)

(4a2+2b3)

=1.1
⇒ (2 + 20)/(4 + 16) = 1.1
⇒ 22/20 = 1.1
⇒ 1.1 = 1.1
LHS = RHS
∴ a : b = 1 : 2