Question

find equivalent resistance and current drawn by battery​

Answer 1

The current through the circuit is the same for each resistor in a series circuit and is equal to the applied voltage divided by the equivalent resistance: I=VRS=9V90Ω=0.1A. Note that the sum of the potential drops across each resistor is equal to the voltage supplied by the battery.
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Answer 2

Answer:

the equivalent resistance of battery is 10ohm