Answer:
C. 14.4 kwhr.
Explanation:
To calculate the energy used by appliance first calculate the power. The formulae for calculating power(P) is [tex] P= I \times V[/tex], where V stands for voltage and I stands for current.
In the given problem, V = 240 volts and I = 15 amp. Therefore,
[tex]P=240 \times 15 =3600\ watt(w) = 3.6\ kw[/tex]
Now, formulae for calculating energy used i.e. work(W) is [tex]W = P\times t[/tex], where t is the time.
In the given question time is 4 hr. Therefore energy used will be,
Energy used (W) = [tex]3.6\times4 =14.4\ kwhr[/tex].
