Q: Which of the following concrete grades is suitable for lean concrete bases? निम्न में से कौन-सा कंक्रीट ग्रेड लीन कंक्रीट बेस के लिए उपयुक्त होता है ?
A.
M 7.5
B.
M 15
C.
M 20
D.
M 30
Correct Answer:
Option A -
Explanations:
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