2. Ayrton Senna had to cover a distance of 60 km.
However, he started 6 minutes later than his sched-
uled time and raced at a speed 1 km/h higher than
his originally planned speed and reached the finish
at the time he would reach it if he began to race
strictly at the appointed time and raced with the as-
sumed speed. Find the speed at which he travelled
during the journey described.
(a) 25 km/h
(b) 15 km/h
(c) 10 km/h
(d) 6 km/h
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