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Determine the cost of painting the exterior walls and top of a cylindrical wheat silo that is 40 m high and 20 m in diameter. given that each litre of paint costs $7.25 and covers 8 meter square.

  • math -

    SA = (π * r^2) + (2 * π * r * h)

    Divide the total area by 8. Multiply by 7.25.

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