Question

find the cost of painting a cylinder when diameter is 7 cm and height is 4cm cost is rupees 2 per cm​

Answer 1

Step-by-step explanation:

i hope this may help u

Answer 2

Step-by-step explanation:

h=4cm r = 7/2 cm

we need to find that of cylinder

tsa =

$2\pi \: r \:(r + h)$

= 2 × 22/7 × 7/2 ( 7/2 +4)

= 44/2 ( 7/2 + 8/2 )

=22× 15 / 2

= 11×15

= 165 cm2

cost = 165 × 2 = 330 rupees