the external dimensions of an open rectangular box are 98cm by 84 cm by 77 cm. If the wood is 2 cm thick all around find:

​i) the internal dimensions of the box

1. )the internal volume of the box
2. ) the volume of the wood used in making the box
3. the weight of the box in kg correct to 1 cm3 of wood weighs 0.95g

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