$3-5\mathrm{.}7.$ A beam supports a load varying uniformly from an intensity $2,000s,$ of $wl\frac{b}{t}t$ at the left end to $pl\frac{b}{t}t$ at the right end. Find the values' of w and $p$ to cause the reactions shown in Fig. P$-3-5\mathrm{.}7.$

$=1250l\frac{b}{f}t$;$p^{\text{'}}=1750l\frac{b}{f}t$

Ans.