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is of ed JOU LET US DO Visit any flour mill and observe the separation of wheat grains from unwanted particles by the process of sieving. Request your mother to sieve the flour or grains in front of you. Observe the various types of sieves present in your home. Note down the difference in the size of their holes. Find out from your mother about the use of these sieves. |
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Answer» Given :-A grandfather is ten TIMES older than his granddaughter.He is also 54 years older than her.To Find :-What is their present ages.Solution :-LET,\mapsto \bf{Granddaughter's\: present\: age =\: y\: years}↦Granddaughter ′ spresentage=yyears\mapsto \bf{Grandfather's\: present\: age =\: 10y\: years}↦Grandfather ′ spresentage=10yyearsAccording to the question,\implies \SF 10y =\: y + 54⟹10y=y+54\implies \sf 10y - y =\: 54⟹10y−y=54\implies \sf 9y =\: 54⟹9y=54\implies \sf y =\: \dfrac{\cancel{54}}{\cancel{9}}⟹y= 9 54 \implies \sf y =\: \dfrac{6}{1}⟹y= 16 \implies \sf\BOLD{\purple{y =\: 6\: years}}⟹y=6yearsHence, the required ages of granddaughter and grandfather are :➲ Present age of Granddaughter :\longrightarrow \sf Present\: Age_{(Granddaughter)} =\: y\: years⟶PresentAge (Granddaughter) =yyears\longrightarrow \sf\bold{\red{Present\: Age_{(Granddaughter)} =\: 6\: years}}⟶PresentAge (Granddaughter) =6years➲ Present age of Grandfather :\longrightarrow \sf Present\: Age_{(Grandfather)} =\: 10y\: years⟶PresentAge (Grandfather) =10yyears\longrightarrow \sf Present\: Age_{(Grandfather)} =\: 10 \times 6\: years⟶PresentAge (Grandfather) =10×6years\longrightarrow \sf\bold{\red{Present\: Age_{(Grandfather)} =\: 60\: years}}⟶PresentAge (Grandfather) =60YEARS{\small{\bold{\underline{\therefore\: The\: present\: age\: of\: granddaughter\: and\: grandfather\: is\: 6\: years\: and\: 60\: years\: respectively\: .}}}} ∴Thepresentageofgranddaughterandgrandfatheris6yearsand60yearsrespectively. |
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