36 men can finish a job in 18 days. In how many days will 27 men complete the same work (same efficiency)?

Concept / Approach

• Assuming equal efficiency, Work = Men × Days (constant for the same job).

Step-by-step calculation36 × 18 = 27 × DD = (36 × 18) ÷ 27 = (4/3) × 18 = 24

Quick checkFewer men (27 < 36) ⇒ more days; 24 > 18, consistent.

Final Answer24 days