Answer / sabarish

let x be fixed charge and y be the variable charge

x+25y = 25*70 = 1750 ---------- 1.
x+50y = 50*60 = 3000 ------------2.

solving (1) & (2).

x=500 and y = 50

let a be charge per head for 100 boarders

500 + 50 * 100 = 100 * a

solving we get a = 55 .

Answer / abdul

20kmph

Answer / jensi

Rs.40

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