Answer:
QP = 29
Step-by-step explanation:
[tex]let \: QP = x \\ 31 \times 31 + 31x = 43 {}^{3} \\ 961 + 31x = 1849 \\31x = 1849 - 961 \\ 31x = 888 \\ x = \frac{888}{31} \\ x= 28.64516129032258 \\ approx \: \: x=29[/tex]
Qp = 29
