There is a rectangular steel plate with a length of 200cm, a width of 100cm and a thickness of 3cm. After forging, the width does not change and the length increases by 20%, so the thickness of the rectangular steel plate after forging is thicker It's about the intermediate process

It's not difficult~~
Firmly grasp one point: the volume of steel plate remains unchanged during forging
The volume before forging is 200 × 100 × 3 = 60000 cubic centimeter
After forging, the width remains unchanged, so it is still 100, and the length increases by 20%, so the length becomes 200 × (1 + 20%) = 240, so the thickness is 60000 divided by 240 and then divided by 100, which is equal to 2.5cm
Keep working hard ~ ~ come on ~ ~!

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