RRB RPF RPSF SI and CONS Model Papers 5 with solutions

(1) Let the buses meet after x hours.
∴ Distance travelled by bus A in x hours = 40x km; and distance travelled by bus B = 50x km
According to the question,
40x + 50x = 180
⇒ 90x = 180
⇒ x = 2
∴ The buses will meet after 2 hours.