RRB NTPC CBT 2 Level 4 Exam 10 May 2022 Shift 1

Question : 26 of 120

Marks: +1, -0

A man covers 250 km, 120 km and 50 km at the speed of 50 km/h, k km/h and 25 km/h, respectively. If his average speed for the whole journey is 42 km/h, then what is the value of k?