3. Curved surface area of a cone is 308 cm² and its slant height is 14 cm. Find (i) radius of the base and (ii) total surface area of

Question

3. Curved surface area of a cone is 308 cm² and its slant height is 14 cm. Find
(i) radius of the base and (ii) total surface area of the cone​

in progress 0
1 month 2021-08-14T13:31:35+00:00 2 Answers 0 views 0

Answers ( )

    0
    2021-08-14T13:32:53+00:00

    Step-by-step explanation:

    GIVEN:

    CSA OF CONE=308 CM^2

    HEIGHT =14 CM

    TO FIND;

    RADIUS OF THE BASE.

    TOTAL SURFACE AREA OF CONE.

    SOLUTION:

    csa = \pi \times r \times l  \\  \\  =  > 308 =  \frac{22}{7}  \times r \times 14 \\  \\  =  > 308 = 44r \\  \\  =  > r =  \frac{308}{44}  = 7cm

    NOW TOTAL SURFACE AREA:

    tsa = \pi \times r(l + r) \\  \\  =  \frac{22}{7}  \times 7(14 + 7) \\  \\  =  22 \times 21 = 461 \:  {cm}^{2}

    0
    2021-08-14T13:33:05+00:00

    Answer:

    Step-by-step explanation:

    ANSWER:-

    Given that:-

    • CSA of a cone is 308 metre square
    • The Slant height is 14 cm

    To find:-

    1. The Radius of the base
    2. TSA of the cone.

    Let’s Do it!

    \sf{\pi \times r \times l = CSA}

    \dfrac{22}{7} \times r \times 14 = 308

    r = \dfrac{308}{44}

    \sf{r = 7 cm}

    Total Surface Area:-

    \sf{\pi \times r (l+r) = TSA}

    \dfrac{22}{7}\times 7(7+14)

    22(21)

    \sf{= 462 \ cm^2} is the required answer.

Leave an answer

Browse
Browse

18:9+8+9*3-7:3-1*13 = ? ( )