Using the same rates, find the amount of the bill if two successive readings are 981 and 1038 kilowatt hours. ... How many watt-hours would four 25-W bulbs burn if they burned for 5 hours? b. If 1000 ... An electric refrigerator uses 150 watts per hour. If it runs 37^% of the time, how many kilowatt-hours does it use in one day?

Title | : | Basic Mathematics for High Schools |

Author | : | Thordur Waldimar Thordarson, Robert Perry Anderson |

Publisher | : | - 1959 |

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