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find the area of road rolled by roller in 100 revolution whose diameter is 84 cm and length is 105 CM |
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Answer» Step-by-step EXPLANATION: As it is roller , it's shape is CYLINDER. area rolled in one REVOLUTION = CSA of cylinder 2× PIE × r × h = 2×22÷7×42×105 ( as d=84, r= 42) = 44×6×105 =27720 cm area COVERED in 100 revolution = CSA ×100 =27,72,000 cm |
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