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    Rachna can eat 21 oranges in 60 minutes. She wants to know how many minutes it would take her to eat 35 oranges at the same pace?
    Question

    Rachna can eat 21 oranges in 60 minutes. She wants to know how many minutes it would take her to eat 35 oranges at the same pace?

    A.

    90 min

    B.

    80 min

    C.

    120 min

    D.

    100 min

    Correct option is D

    Given:

    Rachana eats 21 oranges in 60 minuts.

    It will take her to eat 35 oranges at same pace.

    Solution:

    The rate at which Rachana eats oranges is constant, So :

    Orange eatenTime taken\frac{Orange\ eaten}{Time\ taken} = 2160\frac{21}{60} = 35x\frac{35}{x} 

    Now,

    21 × xx = 35 × 60

    21xx = 2100

    xx = 210021\frac{2100}{21} = 100 minute

    Thus, the correct answer is (D)

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