Question

the volume of the
The height of a wooden in the form of a
right circular cone is 24 and volume is 1232cc
Find the cost polish the whole surface
of the toy at the rate of 2.50 per sq. cm​

Answer 1

Answer:

Rs 1815 HOPE IT HELPS YOU

Step-by-step explanation:

Volume of cone = 1232

Height = 24

Volume of cone = 1/3π$r^{2} h$

1232 = $\frac{1}{3} *\frac{22}{7} *r^{2} *24$

1232 X 7 X 3 = 22 X 24 X r^2

$\frac{1232*7*3}{22*24} = r^{2}\\49 = R^2$

R = 7 cm

Slant Height  = $\sqrt{r^2+h^2}$

$\sqrt{7^2+24^2} \\L = \sqrt{49+576} \\L = \sqrt{676}\\L = 26 cm$

Total Surface Area of Cone = πr(r+l)

T.S.A = $\frac{22}{7} *7(7+26)$

T.S.A = 22 X (33)

T.S.A = 726 cm^2

Cost of polish the whole surface area per sq m = Rs 2.50

Cost of polish the whole surface area 726 sq m = 2.50 X 726

 = Rs 1815.0