In a row of men, Manish is 30th from the right and Kavit is 20th from the left. When they swap their positions, then Manish becomes 35th from the right. What is the total number of men in that row?
54
54 is correct.
In a single row, a person's place from the left and place from the right always add up to one more than the total number of people.
After the swap, Manish stands at Kavit's old place, which is 20th from the left.
The same place is now 35th from the right, because Manish becomes 35th from the right after the swap.
Total men = position from left + position from right − 1 = \(20 + 35 - 1 = 54\).
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