Where Is Packet Lunchbox?

A tea packet in a shape of a cuboid were L =8cm, W=5cm,D=12.5cm?

  • (a) calculate the volume of the packet? There are 125 grams of tea in a full packet, Jason has to design a new packet that will contain 100g of tea when it is full (b1)work out the volume of the new packet? (b2) express the weight of the tea in the new packet as a % of the weight of the tea in the packet shown.

  • Answer:

    volume = l*w*d = 8*5*12.5 = 500 cm^3 500 cm^2 contains 125 gm tea. so, 1 gm can be contained in = 500/125 so, 100 g needs = 500/125*1`00 = 400 for 100 gms, 400 cm^3 is required. ================================ weight of tea in new pack = 100 g 100 g as % of weight of original pack = 100 / 125 * 100 = 80 %

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(a) volume of the cuboid L X W X D 8 X 5 X 12.5 = 500cm^3 500/125 = 4 4 X 100 400cm^3

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