A car travels 30 km at a uniform speed of 40km/h and the next 30 km at a uniform speed of 30km/h.find its average speed
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Answer:
Ans. Average speed = 34.28km/h
Explanation:
Since, speed=distance /time
Therefore, time=distance/speed
So,
T1=D1/S1
T1=30/40 hr
T1=3/4hr
Similarly
T2=D2/S2
T2=30/30hrs
T2=1hr
Now,average speed=total distance travelled /total time taken
Ave. speed =(30+30)km/(3/4+1)hrs
=60*4/7km/hr
=240/7 km/hr
=34.28km/hr
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aneessyed:
how u have done i didn't understood
I have find time taken to travel first 30km and than time taken to travel second 30km
in last three lines i didn't understood
I have attached a photo with answer
see it
can i ask 1 question please
yes please
a car is travelling at a velocity of 36 km/h.if its velocity increases to 72 km/h in 10 seconds.find the acceleration of the car
acceleration =change in velocity /time so, acceleration =72-36/10, acc.=3.6km/hr^2
explanation ke saath solve karo na please
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