(A) 5 km/hr
(B) 6 km/hr
(C) 8 km/hr
(D) 10 km/hr
Correct Option is: D
Time required = (5 hrs – 5/3 hrs)
=(5 hrs – 100 mints)
= (5 hrs – 1hr 40 mints)
= 3 hrs 20 mints
= 3 1/3 hrs
Required speed = (100*3/10) km/hr
=30 km/hr
Original speed = (100/5)km/hr = 20 km/hr
Difference speed = required speed – original speed
=(30-20)
=10km/hr