Question

a distance of 33km is covered in one hour 12 min if the first 15km is covered at the speed of 25 km per hour find the speed during the remaining distance

Answer 1

total distance = 33 km
time = 1 h 12 min = 1.2 h
time taken to cover the first 15 km = distance / speed = 15 / 25 = 0.6 h
therefore time taken for the second half of the journey = 1.2 - 0.6 = 0.6
distance remaining to cover = 33 - 15 = 18 km

speed = distance / time = 18 / 0.6 = 30 km h

Answer 2

given
distance=33km
time=1.2hr
now
15km is covered at the speed of 25km/hr
so time=d/t=15/25=0.6hr
remaining distance=33-15=18km
remaining time =1.2-0.6=0.6hr
so speed=d/t=18/0.6=30km/hr