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In Christmas, ahotel is decorated With # lines of colour bulbs. There
areJ bulbs in one line. Each bulb consumes 了units of electricity in

one hour
(a) 了Howmuch electricity does one line of bulbs consume in ahour?

(b) How much electricity does the whole decoration consume in a

hour?

(c)。 IF婭三15,妃三10 and了三40, evaluate the amount ofelectricity

consumed in one hour

(6marks)