(Solved): 6 Find the outside surface area of a pipe of radius \( 85 \mathrm{~cm} \) and ...

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6 Find the outside surface area of a pipe of radius \( 85 \mathrm{~cm} \) and length \( 4.5 \mathrm{~m} \), to one decimal place. Answer in \( \mathrm{m}^{2} \). 7 The base and sides of a circular cake tin are to be lined on the inside with baking paper. The tin has a base diameter of \( 20 \mathrm{~cm} \) and is \( 5 \mathrm{~cm} \) high. What is the minimum amount of baking paper required, to one decimal place? 8 The inside and outside of an open-topped cylindrical concrete tank is to be coated with a special waterproofing paint. The tank has diameter \( 4 \mathrm{~m} \) and height \( 2 \mathrm{~m} \). Find the total area to be coated with the paint. Round to one decimal place.