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Find the height of a rectangular prism if the surface area is 148 cm2, the width is 4 cm and the length is 5 cm. i dont get it
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due to the nature of a rectangular prism each end is a square. refer to my drawing.|dw:1340928143065:dw| so area due to squares at either end is 2*4*4=32. That means that the recatangles on the side have a total area of 148-32=116. There are four rectangles so area of each rectangle is 116/4=29. we know the length if the rectangles is 5, as area of rectangle is base* height, 29=5*h, therefore h=5.8cm
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