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Question

If a vessel gets filled by 15 glasses of milk where capacity of each glass is 1.5 L, how many glasses are required to fill the same vessel if the capacity of each glass is 0.5 L?

This question was previously asked in
RRB NTPC 2019 CBT 1 Question Paper (8-Mar-2021) (Shift 2)
The correct answer is
45

Vessel Filling Calculation with Changing Glass Capacity

The problem requires calculating the total volume of the vessel first and then determining the number of smaller glasses needed to fill the same volume. This demonstrates an inverse relationship between glass capacity and the number of glasses required.

Calculate Total Vessel Volume

The total volume of the vessel can be found by multiplying the initial number of glasses by the capacity of each initial glass.

Total Volume = (Number of initial glasses) $\times$ (Capacity of each initial glass)

Given:

  • Number of initial glasses = 15
  • Capacity of each initial glass = 1.5 L

Calculation:

Total Volume = 15 $\times$ 1.5 L

Total Volume = 22.5 L

Calculate New Number of Glasses

Now, we need to find how many glasses of the new capacity are required to fill the same total volume (22.5 L).

New Number of glasses = Total Volume / (Capacity of each new glass)

Given:

  • Total Volume = 22.5 L
  • Capacity of each new glass = 0.5 L

Calculation:

New Number of glasses = 22.5 L / 0.5 L

New Number of glasses = 45

Conclusion

Therefore, 45 glasses are required to fill the vessel if each glass has a capacity of 0.5 L.

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