Answer : 3 Rs. 6000 Explanation : Answer: C) Rs. 6000 Explanation: Total are of all stairs = 50 (20x60 30x60)= 50 (1200 1800)= 50 x 3000= 150000 sq cm.Given rate of 100 sq cm = Rs. 4Then for 150000 sq. cm = ?=
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