A 3000 W oven is cooking your Sunday roast for 1 hour and
35 minutes. How much did it cost to cook it?

Cost estimated is ₹[19/4]y/-. Given :- Power=3kW  , Time=1hr 35minNow to convert this time completely into hours following steps can be adopted:- 1 min =1/60 hour,       so 35min =35/60 hour35min= 35/60 =7/12 hourSo total computed time = 1hr + [7/12]hr computed time =19/12hrNow since in the question there is no mention about cost , so let the cost be ₹y/unit.Mathematically , Energy is the product of power and time , i.e. E= Power x Computed time = 3 x 19/12 = 19/4 units.Now the energy estimated is 19/4 units whose cost equivalent will be ₹[19/4]y/- , as cost of one unit energy  is ₹y/- so cost of 19/4 energy units will be ₹[19/4]y/-. Once the cost of one unit energy is known to us then just its value in the place of y and we will get the exact amount expended on the total energy consumption.To know more about cost estimated and energy estimated : https://brainly.in/question/1293312#SPJ1