Question

va rog mult sa ma ajutați ​

Answer 1

......................................

Answer 2

$\it a)\ \ L\cdot\ell \cdot h=\mathcal{V} \Rightarrow 14\cdot \ell\cdot2,5=147|_{:7} \Rightarrow 2\cdot\ell \cdot2,5=21 \Rightarrow 5\cdot\ell=21|_{:5} \Rightarrow \\ \\ \Rightarrow \ell=4,2\ m\\ \\ \\ b)\ \ \mathcal{V}=147m^3=147000dm^3=147000\ell$