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किसी समलम्ब मैदान का क्षेत्रफल `1440m^(2)` है। उनकी समानान्तर रेखाओं के बीच दूरी `24 m` है। यदि समानान्तर भुजाओं का अनुपात `5:3` तो बड़ी समानान्तर भुजा की लम्बाई ज्ञात करें?
A. `75 m`
B. `45 m`
C. `120 m`
D. `60 m`

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Correct Answer - A
समांतर भुजाओं का अनुपात
`=5:3`
माना कि भुजाएं
`5x` and `3x`
area `=1/2` (sum of parallel sides) `xx` Perpendicular distance `=1440m^(2)`
`1/2(5x+3x)xx24=1440`
`4x xx 24=1440`
`x=1440/(4xx24)=15m`लंबी भुजा की लंबाई `=5x`
`=5xx15=75m`

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