Math, asked by llPikachull01, 2 months ago

Hi Friends,

A solid Cylinder of radius 7 cm and height 20 cm is made of material Whose density is 6 g per cm^3. Find its cost at the rate of ₹ 100 per kilogram.

┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈

Class - 9th
Chapter - Surface area & Volume

No spam. Spam will be reported immediately and action will be taken. Don't be greedy for points.

Be Brainly™ -:)​

Answers

Answered by xoxanonymusyandere
4

Answer:

₹1848

Step-by-step explanation:

Radius = 7cm

Height = 20cm

Volume = \frac{22}{7} × r^{2} × h

= \frac{22}{7} × 7 × 7 × 20

Volume = 3080cm^{3}

Density for 3080cm^{3} = 3080 × 6

=  18480g = 18480/1000 = 18.48kg

Cost at the rate of  ₹ 100 per kilogram = 18.48 × 100

= ₹1848

Answered by Anonymous
45

━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

\large\red{{ \fcolorbox{blue} {yellow}{ \underline{ \red{Required \: Aɴsᴡᴇʀ}}}}}

 \sf \scriptsize{Given  \: that}  \sf \scriptsize{\begin{cases} \sf{Radius  \: of \:  Cylinder  = 7 cm } \\  \sf{Height = 20 \: cm.} \end{cases}}

 \sf \scriptsize{ \therefore \:Volume \:  of \:  the \:  Cylinder = \pi \: r^{2} h } \\  \sf \scriptsize{ = \:  \frac{22}{7} \times 7 \times 7 \times 20 = 3080 \: cm^{3}  }

 \sf \scriptsize{Now , density  \: of \:  the  \: solid \:  Cylinder \:  = 6 \:  gm / cm ^3}

 \sf \scriptsize{Mass = Volume \times  density = 3080 \times  6 gm = 18480 gm} \\  \sf \scriptsize { =  \frac{18480}{1000} kg  = 18.48 \: kg.}

 \sf \scriptsize{Cost  \: of  \: Solid \:  cylinder  \: of  \: 1 kg \:  = ₹ 100}  \\  \sf \scriptsize{\therefore \:Cost  \: of \:  Solid  \: cylinder  \: of \:  18.48 \:  kg \:  = ₹ 100   \times 18.48 =  \red{₹1848}}

━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

Similar questions