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1 year ago

the radius of the base of a cylinder is 7cm and height is 8cm find the volume and surface area of the solid cylinder

Mathematics

1 answer:

Musya8 [376]1 year ago

8 0

Answer:

Volume=1232cm Surface area=660cm

Step-by-step explanation:

Volume=π x r² x t

=22/7 x 7 x 7 x 8

=1232cm

Surface area=2 x π x r x (r+t)

=2 x 22/7 x 7 x (7+8)

=44 x 15

=660cm

SORRY IF I AM WRONG, I'M TRYING MY BEST

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2 years ago

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2 years ago

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2 years ago

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2 years ago

You stand a known distance from the base of the tree, measure the angle of elevation the top of the tree to be 15â—¦ , and then

gogolik [260]

Answer:

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Step-by-step explanation:

From the question we are told that

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$h = D tan \theta$ Note : this evaluated using SOHCAHTOA i,e

$tan\theta = \frac{h}{D}$

Generally for small angles the series approximation of $tan \theta \ is$

$tan \theta = \theta + \frac{\theta ^3 }{3}$

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$h = D (\theta + \frac{\theta^3}{3} )$

$dh = D (1 + \theta^2) d\theta$

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$\pm p$ %

=> $\frac{dh}{h} = \pm p$

=> $\frac{1 + \theta ^2}{\theta + \frac{\theta^3}{3} } d \theta = \pm p$

=> $d\theta = \pm \frac{\theta + \frac{\theta^3}{3} }{1+ \theta ^2} * \ p$

So for $\theta_1$

$d\theta_1 = \pm \frac{\theta_1 + \frac{\theta^3_1 }{3} }{1+ \theta_1 ^2} * \ p$

substituting values

$d [\frac{\pi}{12} ] = \pm \frac{[\frac{\pi}{12} ] + \frac{[\frac{\pi}{12} ]^3 }{3} }{1+ [\frac{\pi}{12} ] ^2} * \ p$

=> $d\theta_1 = 0.25 p$

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$d\theta_1 = (0.25* 57.29) p$

$d\theta_1 =(14.36p)^o$

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2 years ago

the radius of the base of a cylinder is 7cm and height is 8cm find the volume and surface area of the solid cylinder​

the radius of the base of a cylinder is 7cm and height is 8cm find the volume and surface area of the solid cylinder