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Engineering Exams RRB-JE JE (Junior Engineer) CMA (Chemical and Metallurgical Assistant) DMS (Depot Material Superintendent) CS (Chemical Supervisor - Research) MS (Metallurgical Supervisor - Research) Mathematics 2019 24.05.2019 Paper-1 Shift-1 Easy +1 -0.33
If 20% of a = b, then b% of 20 is the same as:
Correct Answer: C. 4% of a
Explanation: The problem states that 20% of a equals b, which can be written as 0.20 * a = b. We need to find what b% of 20 is equivalent to. By substituting the expression for b into this second calculation, we get (0.20 * a / 100) * 20. Simplifying this expression results in (a / 500) * 20, which reduces to a / 25. Since 4% of a is also equal to a / 25, b% of 20 is the same as 4% of a.
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