Labelling each of the resistance as shown in the figure below.

Resistance R₁ and R₂ are in series

⇒ R_s1 = R₁ + R₂

⇒ R_s1 = 3 + 3 = 6Ω

Now R_s1 and R₃ are in parallel.

⇒

⇒

⇒

⇒

⇒ R_p = 2Ω.

Now R₄, R_p and R₅ are in series.

⇒

⇒

Hence the Equivalent resistance of the circuit is 3Ω.

For Ammeter Reading

Current (I) =

Hence the current reading in ammeter is 1A.