Question

the radius & heigth of a cylinder are 10 cm&30cm find the cost of painting its outer curved suface at the rate of ₹3 per cm square​

Answer 1

$\huge\star{\rm{\underline{\underline{ YoUr \: AnSwEr}}}}\star$

$\large\red{\sf{\underline{\underline{GiVeN:-}}}}$

•Radius = 10cm

•Height =30cm

•Rate of painting = 3$\rm\ ruppee\ \ per\ cm^2$

$\large\red{\sf{\underline{\underline{To \: find :-}}}}$

• Cost of painting

$\large\red{\sf{\underline{\underline{SoluTion:-}}}}$

We have to cost of painting on outer surface area so first we find the area and then multiply it by the given rate

$\large\star\purple{\boxed{\sf Outer \: surface \: area = 2πrh }}\star$

Now, Constitute the given values :---

$\large\sf\to\ 2\times\ π \times\ r \times\ h \\ \\ \large\sf\to\ 2 \times\frac{22}{7}\times\ 10 \times\ 30 \\ \\ \large\sf\to\ 1885.71$

$\large\star\purple{\boxed{\sf\ CosT \:of \: painting = Rate \times\ Outer \: Surface \: area}}\star$

$\large\sf\to\ 1885.71\times\ 3 \\ \\ \large\sf\to\ 5657.13 \: rupees$

Answer 2

please mark me brainliest XD..... if u found any help.....