# Thread: Volume of shape (NON CALC)

1. ## Volume of shape (NON CALC)

WITHOUT using a calculator (non-calc paper), you have to find the volume of this shape.. NOw i know the volume of a pyramid is 1/3 x base area x height, but this is hard without a calculator.. how would you do this?

2. Originally Posted by Danielisew
WITHOUT using a calculator (non-calc paper), you have to find the volume of this shape.. NOw i know the volume of a pyramid is 1/3 x base area x height, but this is hard without a calculator.. how would you do this?

The volume of the pyramidal section is
$\frac{1}{3} \cdot (5 \cdot 5) \cdot 6 \, cm^3$

$= \frac{1}{3} \cdot 25 \cdot 6 \, cm^3$

It doesn't matter what order we multiply or divide in, so divide the 6 by 3:

$= 25 \cdot 2 \, cm^3 = 50 \, cm^3$

Can you do the rest?

-Dan

3. Sorry i cannot see and don't understand the symbols in between your working out... can you explain or redo it using x for multiply.. or just make it clearer?

Thanks..

4. oh wait sorry i get it.. all those weird little signs are 'x' signs? (*)

5. Originally Posted by Danielisew
oh wait sorry i get it.. all those weird little signs are 'x' signs? (*)

6. 300cm cubed..?

7. Originally Posted by Danielisew
300cm cubed..?
are you asking me or telling me?

EDIT: You are correct! did you use a calculator?

8. haha no, 5 times 5 is 25
25 x 10 is 250.. + 50.. easy!