Question

Each Stone in Stonehenge weigh 2.3 tons period if there are five stones that weigh 1 ton how much do all the stone weigh if they were 20 stones all together?

Answer 1

There is 20 stones and given five stones are weigh 1 ton and other stones are weigh 2.3 tons.

The total weight is,

$\begin{gathered} W=W1\times15+W2\times5 \\ W=2.3\times15+1\times5 \\ W=34.5+5 \\ W=39.\text{5 tons} \end{gathered}$