Math, asked by happybe, 10 months ago

CBSE class IX NCERT pg. no. 217 ex. 13.2 q. No. 11.... plzzz urgent

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Answered by Anonymous

6

Answer:

R = 3cm , h = 10 .5 cm

surface area of penholder = c.s.a + area of base

= 2πrh + πr^2

2×22/7×3×10.5 + 22/7 × 3 × 3

198+198/7

1584/7

use of cardboard = 1584/7 ×35

= 7920 cm ^2

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