New Enroll in RBI Grade B New Batch - Starts on May 21

    Question

    There is enough food to feed 18 campers for 30 days if each

    has two meals per day. After 10 days, 6 campers leave, and the rest start having three meals a day. For how many additional days will the remaining food last?
    A 10 days Correct Answer Incorrect Answer
    B 15 days Correct Answer Incorrect Answer
    C 10 days Correct Answer Incorrect Answer
    D 20 days Correct Answer Incorrect Answer

    Solution

    ATQ,

    Let each meal require ‘x’ units of food per camper.

    Total food = 30 × 18 × 2 × x = 1080x units

    Food used in first 10 days = 10 × 18 × 2 × x = 360x units

    Remaining food = 1080x – 360x = 720x units

    Remaining campers = 12, meals per day = 3

    Days food will last = 720x ÷ (12 × 3 × x) = 20 days

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