An electric heater is rated at 2.5w.Calculate
the cost of energy consumed by it in 25 days
if it is run for 3.5 hours daily. The cost of
I KWH is priced at Rs.900.
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Answer:
2.5w=2.5÷1000=0.0025KW
energy consumed in a day = 0.0025×3.5=0.00875kw.h=0.00875u
energy consumed in 25 days= 25×0.00875 = 0.21875u
amount = 0.21875 × 900 = 196.875Rs
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