Question

3.1

Answer 1

Answer:

The value is  $C = 30729\ c$

Explanation:

From the question we are told that

  The power rating of the stove is  $P = 4.4 KW = 4.4 *10^{3} \ W$

   The duration of its use everyday is $t_1 = 70 \ minutes = 1.167 \ hours$    

    The rating of the light bulbs is $P_2' = 150 W$

   The number is $n = 7$

   The power rating of the total  bulb is  $P_2 = 7 * 150 = 1050 \ W$

    The duration of its use everyday is  $t_2 = 7 hours$

    The power rating of miscellaneous appliance $P_3 = 1.8 \ KW = 1.8 *10^{3} \ W$

    The duration of its use everyday is $t_3 = 1 hour$

     The power rating of hot water $P = 4 KW = 4 *10^{3} \ W$

      The duration of its use everyday is $t_4 = 120 \ minutes = 2 hours$

Generally the total electrical energy used in 1 month is mathematically represented as

    $E = P_1 * t_1 * 30 + P_2 * t_2 * 30 + P_3 * t_3 * 30+ P_4 * t_4 * 30$

=>  $E = 4.4*10^{3} * 1.167 * 30 + 1050 * 7 * 30 + 1.8 *1 * 30+ 4*10^{3} * 2 * 30$

=>  $E = 614598 \ W \cdot h$

=>   $E = 614.6 \ K W \cdot h$

Generally the monthly electricity  bill is mathematically represented as

    $C = 614.6 * 50$

=> $C = 30729\ c$