Time= 2 hours+12 minutes per lightswitch. She charges her costumers a call-out fee of £35,plus £30 per hour. How much should a costumer be charged for wiring a house with 10 lightswitches?

Step-by-step explanation:

Given

Call out fee =  £35

Per hour =  £30

Time = 2 hours

Per light switch = 12 minutes

Required

Cost of wiring a house with 10 light switches

First, the minutes on the 10 light switches should be calculated'

If time per light switch is 12 minutes;

then

Time for 10 = 12 minutes * 10

Time for 10 = 120 minutes

[Convert to hours]

Time for 10 = 2 hours

Next is to calculate the total time spent altogether

Time = 2 hours + Time spent on 10 light switches

Time = 2 hours + Additional 2 hours

Time = 4 hours

Total Charges = Call out fee + Charges per hour * Time

Total Charges = £35 +  £30 * 4

Total Charges = £35 +  £120

Total Charges = £155