Answer:
Let the present age of granddaughter be x. and the present age of grandfather = 10 x According to question, \[10x=x+54\] or, \[10x-x=54\] or, \[9x=54\] or, \[x=\frac{54}{9}\,\,\,or,\,x=6\] years Hence, granddaughter's age = 6 years and grandfather's age \[=\text{ }6\times 10=60\] years
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