RRB RPF RPSF SI and CONS Model Papers 6 with solutions

(4) Let the number of cows or herdsmen be n.
Total number of legs of both cows and herdsmen = 4n + 2n = 6n
and, Number of heads = 2n.
According to question,
4 × 2n – 28 = 6n
⇒ 2n = 28⇒ n = 14