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Couple of math questions?

I have been writing a few practice exams for an up coming test and am having some issues with two of the questions.

Please show how you work out the problem so I will know how to do it on the test. Thanks in advance!

In an electronic sale, a television was reduced by one-third from the original price. What was the original price if the new sales price is $70?

The answer is $105

In a pizza eating contest a man can eat an eighth of his body weight in 45 minutes. If the man weighs 80kg, how much can he eat in 30 minutes?

The answer is 6 2/3

1 Answer

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  • Kalash
    Lv 4
    6 years ago
    Favorite Answer

    1) Let the original price be x

    You are saying it is reduced by 1/3 from the whole

    = x - 1/3 x = 70

    2/3 x = 70

    x = 3/2 x 70

    x = 105 $

    2) You mean to say he can eat 10 kg in 45 minutes = 2/9 kg in a minute.

    In 30 minutes = 2/9 x 30

    = 60 / 9

    = 6 x 2/3 minutes

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