6. A car travels first 30 km with a uniform speed of
60 km h-1 and then next 30 km with a uniform speed
of 40 km h-!. Calculate : (i) the total time of journey,
OV
(ii) the average speed of the car.
SUV S.
Ans. (i) 75 min, (ii) 48 km h-1 .
Answers
Answered by
1
Answer:
Total distance covered by car = 60 km
And, total time taken in journey t=t1+t2
t=s1/v1+s2/v2
=30/60+30/40=5/4h
therefore, Average speed=Total Distance /total time=60/5/4hr=48km/hr
Answered by
1
Explanation:
t = d/s
total time = d1/s1 + d2/s2
30/60 + 30/40 = 1/2 +3/4 = 5/4
5/4 hour x 60 = 75 min.
Avg spd = total distance/total time
60/5/4
= 48km/hr
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