A generator is on daily use and in the process, ten 60 W and five 40 W tungsten bulbs are on for the same time interval. the energy consumed daily is?

lemibare

11 years ago

xcuse me!, pls can u tell me different btw "19.20" and "19.2" ? Wic means d answer is B & D

New_myde

3 years ago

energy= power × time
note that when we are solving,we need to check our units.
the unit of power is watt,then we have ten 60W and five 40 W
let's check time,we have 24 hours
so 24× 60
energy=(60W × 10 + 40W × 5) × 24
energy=(600W + 200W) × 24
energy= (800W×24hours)
energy =19.2Kwh(kilowatts/hour)

BlowBubblegum

2 years ago

I thought time is in seconds?

RiverHeights

2 years ago

There are 2 correct answers. B and D. 19.2 and 19.20 are the same answers, just that one is at 3S.F and the other is at 2 D.P

BlessingLB

1 year ago

someone should explain better please how did they get 24 and 5

mbaegbuemmanuelikechukwu

2 months ago

sir must 8 put 24hr

emma_0_0_8

1 year ago

My school it says time interval for a reason
meaning the 60watt bulbs work for 12hours then the 40watt bulbs work for the remaining time interval which is equal
simplifying gives 9.6Kwh