a car is moving at a speed of 78 km/h. What time will it take to cover 650 metre
Answers
Answered by
8
Step-by-step explanation:
Given speed = 78 Km/hr = 78 ×(5/18) m/s
Speed = 390/18 m/s
Time = Distance / speed
time = 650 ÷ (390/18)
= (650 × 18) /390
Time = 30 second
Answered by
0
Answer:
Let the each half of the running time be t.
During first half time, speed of car is 80 km/h
Distance covered d
1
=80t km
During second half time, speed of car is 40 km/h
Distance covered d
2
=40t km
Total distance covered d=d
1
+d
2
=80t+40t=120t
Total time taken T=2t
Average speed v
avg
=
T
d
=
2t
120t
=60 km/hr
Step-by-step explanation:
hope this will help you
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