Q4 : A car travelled 30 km at a speed of 40 km/hr. and next 30 km at a speed of 20 km/hr. Calculate the average speed of the car.
Share
Q4 : A car travelled 30 km at a speed of 40 km/hr. and next 30 km at a speed of 20 km/hr. Calculate the average speed of the car.
Sign Up to our social questions and Answers Engine to ask questions, answer people’s questions, and connect with other people.
Login to our social questions & Answers Engine to ask questions answer people’s questions & connect with other people.
EXPLANATION.
car travel 30km at a speed of 40 km/hr
next 30 km at a speed of 20 km/hr
CALCULATE THE AVERAGE SPEED OF CAR.
Total time for the journey is =
t = 30 / 40 + 30 / 20
t = 2.25 hrs
Average speed
V(avg) = 30 + 20 / 2.25
V ( avg) = 26.67 km/hr
Therefore,
average speed of the car = 26.67 km/hr
Verified answer
Explanation:
average speed= total distance covered/ total time taken
total distance=30+30=60km
total time=30/40+30/20
time=3/4+3/2
t=9/4 hr
average speed=60/9/4
=240/9km/hr
hope it helps you