A bus covered 360 km in 6 hours. If it travels at one-fourth of its usual speed, then how much more time will it take to cover the same distance?

18 hours

Speed of bus = \(\frac{360}{6}\) = 60 km/h

\(\frac{1}{4}\)th of speed = 15 km/h

Time taken with 15 km/h of speed = \(\frac{360}{15}\) = 24 hours

Difference in time = 24 - 6 = 18 hours

So , 18 hours more time is required with 15 km/h speed .