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Question

Sonal was given some money to take care of her travel expenses during a 16-day sales drive. However, she had to increase her stay by another 8 days, and as a result her average daily travel allowance went down by ₹80. How much was sanctioned to her in the beginning?

This question was previously asked in
RRB NTPC 2019 CBT 1 Question Paper (8-Mar-2021) (Shift 2)
The correct answer is
₹3,840

Analyzing the Travel Expenses Problem

This problem involves calculating an initial budget based on changes in average daily expenses due to an extended stay. We need to find the total amount sanctioned to Sonal.

Setting Up the Equations

Let the total amount sanctioned (budget) be B.

  • Initial duration = 16 days.
  • Initial average daily allowance = $\frac{B}{16}$.
  • Extended duration = 16 days + 8 days = 24 days.
  • New average daily allowance = $\frac{B}{24}$.
  • The difference in average daily allowance is given as ₹80.

Calculating the Initial Sanctioned Amount

  1. Set up the equation based on the difference in average daily allowance:

    $ \frac{B}{16} - \frac{B}{24} = 80 $

  2. Find a common denominator for the fractions (which is 48):

    $ B \left( \frac{1}{16} - \frac{1}{24} \right) = 80 $

    $ B \left( \frac{3}{48} - \frac{2}{48} \right) = 80 $

  3. Simplify the expression:

    $ B \left( \frac{1}{48} \right) = 80 $

  4. Solve for B (the total sanctioned amount):

    $ B = 80 \times 48 $

    $ B = 3840 $

Therefore, the initial amount sanctioned to Sonal was ₹3,840.

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