Question

a man covered a distance of 272 km in 8 hours . some part of distance was covered as 30 km/hr and remainig distance in 4 hours at certain speed . find speed at which the remaining distance was covered

Answer 1

Speed for 1st 4 hours=30kmph
distance covered in this 4 hours=30*4=120km
total distance travelled=272 km
total time taken=8 hours
remaining dirtance=272-120=152 km
remaining time=4 hours
required speed=152/4=38kmph

Answer 2

The speed at which the man covered the remaining distance is 38 km/hr.

• A  man covered a distance of 272 km in 8 hours.
• Some part of the distance was covered at 30 km/hr and the remaining distance was covered in 4 hours at certain speed.
• The time for which the man covered the distance at 30 km/hr is = 8 hr -4 hr = 4 hr.
• The distance covered by the man at 30 km/hr will be

Distance = speed × time = 30 × 4 = 120 km

• Remaining distance was covered in later 4 hours.

• Remaining distance = 272 - 120 = 152 km.

• Speed at which the man covered distance will be

• Speed = $\frac{Distance}{Time}$

Speed = $\frac{152}{4}$ = 38 km/hr.

• The speed at which the man covered the remaining distance is 38 km/hr.