the sum of the lives of two lamps one ordinary and other LED is 10 years . their product of lives is 26.so determine their lives
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product of their lives = 26
some of their lives equals to 10 years
their lives equals to 26 by 10 is 2.6 years
some of their lives equals to 10 years
their lives equals to 26 by 10 is 2.6 years
omsir:
hope it works I'm not sure
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LED is highly efficiency level and ordinary bulb show little month
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