Characteristic/permissible strength: The permissible compressive strength associated with concrete grade M200 is

Introduction / Context:Some older texts label concrete by kg/cm2. Recognizing equivalence aids in interpreting legacy drawings and questions. M200 corresponds to a characteristic compressive strength near 200 kg/cm2 (≈ 20 MPa).

Given Data / Assumptions:

• Grade naming uses kg/cm2 rather than MPa.
• We are to pick the matching compressive strength value.

Concept / Approach:The numeric part of the grade indicates the characteristic strength at 28 days for standard specimens. Thus M200 aligns with 200 kg/cm2.

Step-by-Step Solution:Identify grade → M200.Match to numerical value of strength → 200 kg/cm2.Select option 200 kg/cm2.

Verification / Alternative check:Conversion: 1 MPa ≈ 10.197 kg/cm2, so 20 MPa ≈ 204 kg/cm2, consistent with the M200 label.

Why Other Options Are Wrong:100, 150, 250, 300 kg/cm2 correspond to other grades; they do not match M200.

Common Pitfalls:Mixing up “permissible”/“characteristic” in legacy terminology; ensure the numeric label matches the standard 28-day strength basis.

Final Answer:200 kg/cm2.