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State PCS PYQPrelims 2022

BPSC – Combined Competitive Examination · Question 87

A 70 kg mixture has sand and cement in the ratio 4:1. How much more sand must be added to make the ratio 6:1?

  1. 28 kg
  2. 30 kg
  3. 32 kg
  4. 24 kg
  5. None of the above / More than one of the above
Show answer & explanation

Answer: (A) 28 kg

Explanation

Cement stays 14 kg; 6:1 needs 84 kg sand; 84 − 56 = 28 kg.

  • (A) Correct

    Correct: sand 56, cement 14; need 84 sand → add 28 kg.

  • (B) Incorrect

    Wrong: too much.

  • (C) Incorrect

    Wrong: too much.

  • (D) Incorrect

    Wrong: too little.

  • (E) Incorrect

    Wrong: only one of the options A–D is correct.