CTET 2 Math and Science Jul 2019 Paper

Total surface area of a cuboid = 194 ${\mathit{m}}^2$
2(lb + bh + hl) = 194
l = 8 m, b = 6 m (Given)
2(8 × 6 + 6 × h + h × 8) = 194
48 + 6h + 8h = 97
14h = 97 – 48
14h = 49
h = $\frac{7}{2}$ m
∴ Volume of cuboid = l × b × h = $8\times 6\times \frac{7}{2}$ = 168 ${\mathit{m}}^2$