Page 58 - Grade 10 C.Math

PsfO 6
a]ngf / uf]nf (Cylinder and Sphere)

6.0 k'g/fjnf]sg (Review)

tnsf lrqx¿ cjnf]sg u/L ;f]lwPsf k|Zgsf] pTt/ kTtf nufpg'xf];\ M
Curriculum Development Centre

(i) (ii) (iii) (iv)

1. dfly lbOPsf lrqx¿sf] ;d"xdf slt k|sf/sf cfs[ltx¿ 5g\ < tL cfs[ltx¿sf] gfd
n]vL ltgLx¿lar kfOg] ;dfgtf / leGgtf tflnsfdf k|:t't ug'{xf];\ .

2. dfly lbOPsf lrqx¿n] cf]u6]sf] ;txnfO{ s] elgG5 < ltgsf] PsfO s] x'G5, n]Vg'xf];\ .

3. dfly lbOPsf] lrqx¿sf] kl/ldlt (Perimeter) / If]qkmn (Area) lgsfNbf ltgLx¿sf]
PsfOdf s] cGt/ kfOG5 < sf/0f lbP/ n]Vg'xf];\ .
6.1 a]ngf (Cylinder)

(a) a]ngfsf] ;txsf] If]qkmn (Surface area of the cylinder)

lj|mofsnfk 1

tnsf] lrqdf b]vfP h:t} Pp6f cfotfsf/ sfuh lng'xf];\ . To;sf] b'O{ ljk/Lt
rf}8fOsf lsgf/fx¿ Ps cfk;df hf]8]/ afF;sf] 9'ª\u|f]sf] jf kmnfdsf] 9'ª\u|f] cfsf/
agfpg'xf];\ . o;/L cfotfsf/ sfuhaf6 agfOPsf] 9'ª\u|f] cfsf/sf] j:t'nfO{ s]
elgG5 < o;df slt lsl;dsf ;tx 5g\ < 9'ª\u|f]sf cfsf/sf] b'O{ ljk/Ltlt/ ag ]
sf j[Ttfsf/ efu h'g cfotsf] rf}8fOaf6 ag]sf] 5g\ . pSt 9'ª\u|f] cfsf/sf] j:t'sf]
nDafO prfOdf ablnPsf] 5 . oxfF 9'ª\u|fsf] jj|m ;txsf]] If]qkmn = sfuhsf] -a]ngfsf]_
If]qkmn = rf}8fO X nDafO = j[Ttsf] kl/lw X prfO = 2πr × h = 2πrh ju{ PsfO

d

b

l r
hxfF r = a]ngfsf] cw{Jof;

55 ul0ft, sIff – 10