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GATE 2023 MT – Question 7

General Aptitude · Quantitative Aptitude: Arithmetic and Number Computation · 2 marks · Multiple choice

To construct a wall, sand and cement are mixed in the ratio of 3:1. The cost of sand and that of cement are in the ratio of 1:2. If the total cost of sand and cement to construct the wall is 1000 rupees, then what is the cost (in rupees) of cement used?

  1. 400
  2. 600
  3. 800
  4. 200

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Show answer and explanation

Correct answer: (A) 400

Explanation

The quantity ratio is 3:1 and unit-price ratio is 1:2.

Hence expenditure is $3(1):1(2)=3:2$. Cement cost is $(2/5)(1000)=400$ rupees, **A**.