Question

Pls tell me and I will mark u brainlist
a car travels 30 kilometre in first hour and its average speed for a 4 hours journey is 45 km per hour then find the speed of car in last 3 hours

Answer 1

Answer:

50Km/h

Explanation: let the value of distance travelled in three hours be x

X/4=45

X=45*4=180KM

So total distance travelled is 180KM.

Distance travelled in first hour= speed* time

30*1=30KM

Distance travelled in first three hours = distance in first hour- distance in four hours

180-30=150KM

Speed = Distance/ time

150/3=50Km/h

Answer 2

Answer:

50km/hr

Explanation:

Car travels in first hour =30km

Total distance=Speed ×time

Total distance=45×4=180km

Distance covered in first hour =30km

Distance left in last three hours=180-30=150km

Average Speed = Total distance/Time

Average speed of car in last 3 hours =150÷3=50

The speed of car in last three hours is 50km/hr