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`        A hollow cylindrical tube open at both ends is made of iron 3 cm thick. if the external diameter be 56 cm and the length of the tube be 182 cm,find the number of cubic cmin it?`
2 years ago

Aabid Hussain
571 Points
```							Hi Vineet,Thank you for askingHeight = 182 cmExternal Radius = 56/2 = 28 cmInternal Radius = 56-6/2 = 50/2 = 25 cmTotal material used = πh(R2 - r2)= 22/7 × 182 × 159= 90948 cm3
```
2 years ago
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