Question

A cylindrical container is 84 cm high and has base radius of 4.2 cm. Find the cost of painting its curved
surface at the rate of $8 per 100 sq cm.​

Answer 1

Step-by-step explanation:

CSA=2πrh

=>2 x 22/7 x 4.2 x 84

=>2 x 22 x 4.2 x 12

=>2217.6cm^{2}cm

2

cost =2217.6 x 8

=17,740.8

Answer 2

height of cylinder = 84 cm

radius of base = 4.2 cm

CSA of cylinder =

$2\pi \: r \: h$

2× 22/7×4.2×84

2×22/7×42/10×84

22176/10

the cost of painting =

rupees 8×22176/10

177408/1000

rupees 177.408 ANSWER