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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In an old Palace there are 50 stairs to go on top floor. Each is 20 cm high, 30 cm wide and 60 cm long. If all the stairs are re-plastered at the rate of Rs. 4 per 100 sq.cm. What is the expenditure ?