Question

The outer dimensions of a closed wooden box are 10 cm x 8 cm x 7 cm. Thickness of the wood is 1 cm. The total cost of wood required to make box, if 1 cm rased power 3 of wood cost 2 rupees​

Answer 1

The volume of wood in the wooden box is given by the following: Volume of box with outer dimensions-Volume of box with inner dimensions

Now, we know that the volume of a cuboid is equal to the product of its length, breadth and height.

Using these formulae, we will get the following:

The volume of wood used = 10×8×7−8×6×5=560−240=32010×8×7−8×6×5=560−240=320 cubic cm.

Now, we will multiply the cost of 1 cubic cm wood to this volume to find the total cost.

Total cost = 2×320=6402×320=640

So, the total cost of wood to make box is Rs. 640

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Answer 2

Answer:

The volume of wood in the wooden box is given by the following: Volume of box with outer dimensions-Volume of box with inner dimensions

Now, we know that the volume of a cuboid is equal to the product of its length, breadth and height.

Using these formulae, we will get the following:

The volume of wood used = 10×8×7−8×6×5=560−240=32010×8×7−8×6×5=560−240=320 cubic cm.

Now, we will multiply the cost of 1 cubic cm wood to this volume to find the total cost.

Total cost = 2×320=6402×320=640

So, the total cost of wood to make box is Rs. 640