Find curved surface area and total surface area of cylinder whose volu

1.	Find curved surface area and total surface area of cylinder whose volume is 1.54 m cube and radius of base is 70 cm
Answer» GIVEN:- Volume of cylinder = 1.54 m³. Radius of base = 70 cm = 0.7m. ⠀ To FIND:- Curved SURFACE area and total surface area of cylinder? ⠀ Solution:- ★ Formula USED:- $\star{\boxed{\sf{\orange{Volume\: of\: cylinder = \pi r^2h}}}}$ ⠀ $\large{\tt{\longmapsto{1.54 = \pi (0.7)^2h}}}$ ⠀ $\large{\tt{\longmapsto{1.54 = \dfrac{22}{7} \times 0.49 \times h}}}$ ⠀ $\large{\tt{\longmapsto{1.54 = 22 \times 0.7 \times h}}}$ ⠀ $\large{\tt{\longmapsto{1.54 = 15.4h}}}$ ⠀ $\large{\tt{\longmapsto{h = \dfrac{1.54}{15.4}}}}$ ⠀ $\large{\tt{\longmapsto{h = 0.1}}}$ ⠀ Height = 0.1 m ⠀ $\boxed{\sf{\orange{TSA = 2 \pi r(h + r)}}}$ ⠀ $\large{\tt{\longmapsto{TSA = 2 \times \dfrac{22}{7} \times 0.7 (0.1 + 0.7)}}}$ ⠀ $\large{\tt{\longmapsto{TSA = 44 \times 0.1(0.8)}}}$ ⠀ $\large{\tt{\longmapsto{TSA = 44 \times 0.08}}}$ ⠀ $\large{\tt{\longmapsto{TSA = 3.52}}}$ ⠀ Total surface area of Cylinder is 3.52m². ⠀ $\boxed{\sf{\orange{CSA = 2 \pi rh}}}$ ⠀ $\large{\tt{\longmapsto{CSA = 2 \dfrac{22}{7} \times 0.7 \times 0.1}}}$ ⠀ $\large{\tt{\longmapsto{CSA = 44 \times 0.1 \times 0.1}}}$ ⠀ $\large{\tt{\longmapsto{CSA = 44 \times 0.01}}}$ ⠀ $\large{\tt{\longmapsto{CSA = 0.44}}}$ ⠀ Curved surface area of Cylinder is 0.44 m². ⠀ Hence, total surface area of the cylinder is 3.52m² and the curved surface area of Cylinder is 0.44m².