For the circuit below, calculate the current through flow from the battery?

To calculate the current through the circuit, we can use Ohm's Law, which states:

V = I * R

Where:
V = voltage (in volts)
I = current (in amperes)
R = resistance (in ohms)

In this circuit, the battery provides a voltage of 12 volts and the total resistance in the circuit is 6 ohms (2 ohms + 4 ohms).

So, we can rearrange Ohm's Law to solve for current:

I = V / R
I = 12 V / 6 ohms
I = 2 amperes

Therefore, the current flowing from the battery through the circuit is 2 amperes.

Calculate the equivalent resistance:

The resistors are connected in parallel, so their equivalent resistance is:
```
1/Req = 1/R1 + 1/R2 + 1/R3
1/Req = 1/10 Ω + 1/15 Ω + 1/20 Ω
Req = 6 Ω
```

Calculate the current through the equivalent resistance:

Using Ohm's law, the current through the equivalent resistance is:
```
I = V/Req
I = 12 V / 6 Ω
I = 2 A
```

Therefore, the current through the battery is 2 A.