Question

Curved surface area of par = 2
- 10.56 -
Carved surface area of 15 pilars = 10.56 x 15
Total cost of painting 15 pilars = 10.56 x 15*2
= 7316.80
Morksheet 4
L Find the curved surface area and total surface area of a right circular cylinder
whose height is 15 cm and the radius of the base is 7 cm.​

Answer 1

Answer:

Step-by-step explanation:

Answer:

Cost\:of \:15\: cylindrical\\pillars = Rs\:396

Step-by-step explanation:

Dimensions \:of \: a\\ \:each\: cylindrical\:pillar:

Diameter (d)=48\:cm\\Radius(r)=\frac{d}{2}\\=\frac{48}{2}\\=24\:cm\\=0.24\:m

Height (h)=7\:m

Area\: of \: painting \: one \: pillar \\=2\pi rh

Area\: of \: painting \: 15\:such \: pillars\\=15\times 2\pi rh\\=15\times 2\times \frac{22}{7}\times 0.24\times 7\\=158.6 \:m^{2}

Cost\:of\: painting \\1\:m^{2} = Rs\:2.50

Cost\:of\: painting \\158.5\:m^{2} = Rs\:2.50\times 158.5\\=Rs\:396

Therefore,

Cost\:of \:15\: cylindrical\\pillars = Rs\:396