the dimension of the whole thing are base x height so the base is 10 cubes across or 20 cm one side so 20 cm x 2 cm = 40 cm squared.40 cm squared x 2 cm (height) is equal to 80 cm cubed. to find the price is to find the surface area. so (20 cm x 2) x 4 (# of rectangular sides) = 160 cm2 rectangular surface area.now you multiply 2 x 2(side squares) by 2(the # of squares) to get 8 cm2 sides now you just add 160 by 8 to get the answer : 168 cm2 multiply that by 0.75 to get the total cost
the dimension of the whole thing are base x height so the base is 10 cubes across or 20 cm one side so 20 cm x 2 cm = 40 cm squared.40 cm squared x 2 cm (height) is equal to 80 cm cubed. to find the price is to find the surface area. so (20 cm x 2) x 4 (# of rectangular sides) = 160 cm2 rectangular surface area.now you multiply 2 x 2(side squares) by 2(the # of squares) to get 8 cm2 sides now you just add 160 by 8 to get the answer : 168 cm2 multiply that by 0.75 to get the total cost
ReplyDeletenot 10 cubes 10cm not 20
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