The diameter of a roller is 70cm and its length is 1.5m .It take 1000 complete revolution moving once over to level a stadium . Determine the area of the stadium.
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Question:-
The diameter of a roller is 70cm and its length is 1.5m .It take 1000 complete revolution moving once over to level a stadium . Determine the area of the stadium.
Answer:-
Area of ground = 400 × CSA of cylindrical roller
= 2 × pi× r×h ×400
= 2×22/7 × 21 × 100 × 400
=5280000 cm^2
=5280000/10000 m^2
= 528 m^2
Cost of levelling 105 m^2 = rs.50
so cost of leveling 1 m^2 = 50/105
So cost of leveling 528 m^2 = 50/105 × 528 = RS.25.14.
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