The sum of the ages of the father and son is 80 years. If ten years ago of father was three times that of his son, find the present age of the son.
ক) 55
খ) 25
গ) 15
ঘ) 45
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ক) 25
খ) 29
গ) 32
ঘ) 35
ক) 0.13541666666667
খ) 0.30208333333333
গ) 0.36458333333333
ঘ) 0.40625
ক) 40
খ) 100
গ) 200
ঘ) 72
ক) Tk. 30,000
খ) Tk. 50,000
গ) Tk. 60,000
ঘ) Tk. 90,000
ক) Tk. 500
খ) Tk. 1,000
গ) Tk. 1,500
ঘ) Tk. 2,000
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