alkyl group are those which belong to group alkane & by removing one hydrogen it is alkyl group
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An alkyl group is formed by removing one hydrogen from the alkane chain. The removal of this hydrogen results in a stem change from -ane to -yl to indicate an alkyl group. The removal of a hydrogen from methane, CH4, creates a methyl group -CH3.
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Let the present age of Shikha be x years. Therefore, the present age of Shikha’s brother Ravish = (x + 3) years. So, sum of their ages = x + (x+ 3) ⇒ x +(x + 3) = 37 ⇒ 2x + 3 = 37 Subtracting 3 from both sides, we get ⇒ 2x+ 3 – 3 = 37 – 3 ⇒ 2x = 34 Dividing both sides by 2, we get ⇒ 2x/2 = 34/2 ⇒ x = 17 Therefore, the present age of Shikha = 17 years, And the present age of Ravish = x + 3 = 17 + 3 = 20 years
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