Page 183 - Grade 10 C.Math

(b) Pp6f j[Ttfsf/ kf]v/Lsf] jl/kl/ 1.68m cUnf] kvf{n nufOPsf] 5 . pSt kf]v/Lsf] lardf
/x]sf] vDafsf] 6'Kkf]df kvf{naf6 x]bf{ 60° sf] pGgtf+z sf]0f aGb5 . olb kf]v/Lsf] Jof;
20m eP kfgLsf] ;txb]lv dflysf] vDafsf] prfO kTtf nufpg'xf];\ .

(c) 120m Jof; ePsf] j[Ttfsf/ kf]v/Lsf] l7slardf Pp6f vDaf 7f8f] kf/]/ ufl8Psf] 5 .

kf]v/Lsf] ;txsf] kl/lwaf6 pSt vDafsf] 6'Kkf]df x]bf{ 30° sf] sf]0f ag]sf] kfOof] .
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olb kf]v/Lsf] ulx/fO 2m eP vDafsf] prfO kTtf nufpg'xf];\ .

(d) Pp6f j[Ttfsf/ kf]v/Lsf] s]Gb|df Pp6f vDaf 7f8f] pEofOPsf] 5 . kfgLsf] ;txb]lv
vDafsf] 6'Kkf]sf] prfO 30 m 5 / kf]v/Lsf] kl/lwdf Pp6f laGb'af6 vDafsf] 6'Kkf]df 60°

sf] sf]0f ePdf kf]v/Lsf] cw{Jof; / kl/ldlt kTtf nufpg'xf];\ .

(e) Pp6f cfotsf/ rp/sf] nDafO k6\l6sf] l8ndf Pp6f 40m cUnf] ;'l/nf] ?v 5 . olb pSt
cfotsf/ rp/sf] nDafOsf] b'O{ lsgf/fsf] laGb'af6 pSt ?vsf] 6'Kkf]df x]bf{ j|mdzM 60° /
30° sf] pGgtf+z sf]0fx¿ ag]sf] kfOof] eg] pSt rp/sf] nDafO kTtf nufpg'xf];\ .

3.(a) Pp6f 16 m cUnf] 3/sf] 5taf6 38 m cUnf] ?vsf] 6'Kkf]df x]bf{ 30° sf] pGgtf+z sf]0f

aGb5 eg] pSt ?v / 3/larsf] b'/L kTtf nufpg'xf];\ .

(b) 1.7 m cUnf] Pp6f dflg;n] cfk"m cufl8 ?vsf] 6'Kkf]df /x]sf] r/f cjnf]sg ubf{
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60° sf pGgtfz sf0f kfof . ?vsf prfO 53.7m 5 eg ?v / dflg;larsf b/L lgsfNgxf; .
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(c) Pp6f 2.5 ld6/ cUnf] kvf{naf6 3.76 ld6/ prfO ePsf] :tDe x ld6/ b'/Ldf 5,
olb :tDesf] 6'Kkf]df kvf{naf6 cjnf]sg ubf{ 30° sf] pGgtf+z sf]0f kfOof] eg] kvf{n /
:tDelarsf] b'/L kTtf nufpg'xf];\ .
(d) Pp6f 3/ / ?vsf] prfO j|mdzM 5m / 17m 5 . olb 3/sf] 5fgfaf6 ?vsf] 6'Kkf]df
x]bf{ 60° sf] pGgtf+z sf]0f kfOof] eg] ?v / 3/larsf] b'/L kTtf nufpg'xf];\ .
4.(a) 45 3 m cUnf] Pp6f :tDesf] 6'Kkf]af6 6.6m cUnf] 3/sf] 6'Kkf]df x]bf{ 30° sf] cjglt
sf]0f aG5 eg] :tDe / 3/ larsf] b'/L kTtf nufpg'xf];\ .

(b) 91m cUnf] w/x/fsf] 6'Kkf]af6 ;dtndf /x]sf] 12m cUnf] 3/sf] 5tdf x]bf{ 60° sf]
cjglt sf]0f kfOof] eg] w/x/f / 3/larsf] b'/L kTtf nufpg'xf];\ .

(c) 80 m cUnf] Pp6f ejgsf] 5taf6 glhs} /xsf] 20m cUnf] :tDesf] 6'Kkf]df cjnf]sg ubf{

45° sf] cjglt sf]0f kfOof] eg] :tDe / ejglarsf] b'/L kTtf nufpg'xf];\ .

180 ul0ft, sIff – 10