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Florabest
10 months ago

I’m not telling you the result. But do you want to do it?

So 3*5=15 hours burn a lamp. This costs 11Euro, i.e. 15/11 Euro per lamp hour

The next step with 5 lamps and 6.5 hours you can now alone…

evtldocha
10 months ago
Reply to  Florabest

… small type: 11/15 € per lamp hour it must be called,

Florabest
10 months ago
Reply to  evtldocha

Yes self-evident …!!!!

Florabest
10 months ago
Reply to  Bebaben

That means you didn’t understand anything I wrote?