Question

Find the (i) volume and (ii) Curved surface area of the right circular cylinder having given the radius of the circular base (r) and height (h) as : (I) r=7cm h = 21cm​

Answer 1

$\blue{\bold{\underline{\underline{Answer:}}}}$$\green{\therefore{\text{Volume\:of\:cylinder=12320\:cm}^{3}}}$$\green{\therefore{\text{C.S.A\:of\:cylinder=1760\:cm}^{2}}}$$\orange{\bold{\underline{\underline{Step-by-step\:explanation:}}}}$$\green{ \underline \bold{Given : }} \ : \implies \text{Radius(r) = 14 \: cm} \ \ : \implies \text{Height(h) = 20 \: cm} \ \ ed{ \underline \bold{To \: Find : }} \ : \implies \text{Volume \: of \: cylinder = ? }\ \ : \implies \text{C.S.A \: of \: cylinder = ? }$• According to given question :[tex] \bold{As \: we \: know \: that } \ : \implies \text{Volume \: of \: cylinder} = \pi {r}^{2} h \ \ : \implies \text{Volume \: of \: cylinder} = \frac{22}{7} \times {14}^{2} \times 20 \ \ : \implies \text{Volume \: of \: cylinder} =22 \times 28 \times 20 \ \ \green{ : \implies \text{Volume \: of \: cylinder} =12320 \: {cm}^{3} } \ \ \bold{As \: we \: know \: that} \ : \implies \text{C.S.A\: of \: cylinder} =2\pi rh…

Answer 2

Answer:

Radius of cylinder (r)=7cm

Height of cylinder (h)=15cm

Curved Surface Area =2πrh

=2×(22/7)×7×15

=660cm

2

Total Surface Area =2πr(h+r)

=2×(22/7)×7(15+7)

=2×22×22

=968cm

2

Step-by-step explanation:

hope this helps you