railway RRB JE (CBT I + CBT II) Mock Test 2024 Quantitative Aptitude Speed Time and Distance

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?

1
45
2
35
3
36
4
40
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