Page 139 - Grade 10 C.Math

cyjf, x = y + 4 ....... (i)

;dLs/0f (i) / (ii) af6

8 – y = y + 4

cyjf, 8 - 4 = 2y
Curriculum Development Centre
cyjf, 4 = 2y

cyjf, 2 = y
k]ml/, ;dLs/0f (i) af6

x = 8 - 2 = 6

To;}n] pSt ;ª\Vof = 10x + y = 10 x 6 + 2 = 60 + 2 = 62 x'G5 .

cEof; 12.1
1. (a) b'O{ cf]6f wgfTds ;ª\Vofsf] of]ukmn 60 / cGt/ 20 eP tL ;ª\Vofx¿ kTtf
nufpg'xf];\ .

(b) olb Pp6f ;ª\Vof csf]{ ;ª\Vofsf] ltg u'0ff 5 / ltgLx¿sf] of]ukmn 24 5 eg] tL ;ª\Vofx¿
kTtf nufpg'xf];\ .

2. (a) Pp6f cfotfsf/ rp/sf] kl/ldlt 54 ld6/ 5 . o;sf] cfsf/ 36fpFbf gofF nDafO /

rf}8fO klxn]sf] nDafO / rf}8fOsf] / u'0ff;Fu a/fa/ x'G5 . olb cfotfsf/ rp/sf] gofF
]
}
}
\
]
'
]
kl/ldlt 36 ld6/ 5 eg rf/sf nDafO / rf8fO ;?df slt lyof < kTtf nufpgxf; .
]
'
(b) Pp6f cfotfsf/ v]tsf] kl/ldlt 240 ld6/ 5 . rf}8fOeGbf nDafO 20 ld6/n] a9L
5 eg] To; v]tsf] If]qkmn slt x'G5 < kTtf nufpg'xf];\ .
3. (a) olb 3 cf]6f snd / 5 cf]6f sfkLsf] d"No ?= 430 k5{ . To:t} 2 cf]6f snd /
1 cf]6f sfkLsf] d"No ?= 170 k5{ . Pp6f snd / Pp6f sfkLsf] 5'6\6f 5'\6\6} d"No
slt x'G5 < kTtf nufpg'xf];\ .
(b) olb 4 cf]6f lstfa / 2 cf]6f sfkLsf] d"No ?= 440 k5{ . Pp6f lstfa / 3 cf]6f
sfkLsf] d"No ?= 240 k5{ . Pp6f lstfa / Pp6f sfkLsf] 5'6\6f 5'6\6} d"No slt
k5{ < kTtf nufpg'xf];\ .

4. (a) olb Pp6f leGgsf] c+znfO{ 4 n] u'0fg u/L x/af6 2 36fOof] eg] glthf 4 x'G5 . pSt
leGgsf] x/ / c+z k|To]saf6 3 36fpFbf leGgsf] dfg 1/2 x'G5 eg] pSt leGg slt
xf]nf < kTtf nufpg'xf];\ .

136 ul0ft, sIff – 10