Answers

2016-03-10T10:46:05+05:30

This Is a Certified Answer

×
Certified answers contain reliable, trustworthy information vouched for by a hand-picked team of experts. Brainly has millions of high quality answers, all of them carefully moderated by our most trusted community members, but certified answers are the finest of the finest.

Perimeter of 1st end = 2 π R 

⇒ 207. 24 cm = 2 x 3.14 x R 
207.24 cm =  6.28 cm x R
 33 = R
i .e R = 33 

Perimeter or 2nd end = 2 π r
169. 56 cm = 2 x 3.14 x r
169. 56 cm  = 6.28 cm x r
27 cm = r 
i .e. , r = 27 cm

So ,
We need to find slant height first .

R = 33 cm 
r = 27 cm
H = 8 cm 
 
⇒ slant height =   \sqrt{( (r _{1} - r_{2} }) ^{2} + \sqrt{h ^{2} }

⇒ Slant height =  \sqrt{( (33 - 27) ^{2} + {8 ^{2} }

⇒ Slant height =  \sqrt{( 360 ) + {64 }

⇒ Slant height = 20 .59 , round it to 20.6 cm

⇒Total surface area = π ( r + R ) l + π R² + π r ²

⇒ Total surface area = 3.14 ( 27 + 33 ) 20.6 + 3.14 ( 33)² + 3.14(27)²

Total surface area = 3.14 ( 60 ) (20.6) + 3.14 ( 1089 ) + 3.14 ( 729)

⇒ Total Surface area =  3881.04 + 3419.46 + 2289.06

⇒ Total Surface area = 9589.56 cm²

2 5 2
Mark my best
By the way sorry I was posting the yesterday but somehow my Lappy got struck
So Sorry and yes mark as bet
best**
ok