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    Question

    An army of 2100 men has provision for 50 days. After 10

    days due to injuries some of them left and the food were now enough for next 50 days for remaining men. The number of men left is:
    A 400 Correct Answer Incorrect Answer
    B 420 Correct Answer Incorrect Answer
    C 410 Correct Answer Incorrect Answer
    D 450 Correct Answer Incorrect Answer

    Solution

    As initially there was provision of food for 50 days for 2100 men, Initial quantity of food = 2100 × 50 = 105000 units. Food consumed in 10 days = 2100 × 10 = 21000 units Food remained after 10 days = 105000 – 21000 = 84000 units. Now, 84000 units of food is sufficient for 50 days for remaining men ⇒ Number of remaining men = 84000/50 = 1680 ∴ The number of men left = 2100 – 1680 = 420

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