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5.
2. A soldier marches at the speed of 2 m/s.
What distance will he cover in one hour?
3. A car travels at 40 km/h for the first third
of its journey, at 35 km/h for the second
third of its journey and at 42 km/h for the
final third of its journey. What is its average
speed?
4. A bus travels at an average speed of 35 km/h
between two towns that are 245 km apart.
If it stops twice for half-hour breaks on the
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Answer:
Hey mate
2.
speed = 2m/s
time = 1hr = 60 minutes = 3600s
distance = speed × time
= 2 m/s × 3600s
= 7200 m
3.
First third speed = 40 km/h
Second third speed = 35 km/h
Final third speed = 42 km/h
Average = {(40+35+42)÷3}
=117÷3
=39 km/h
4.
speed of bus = 35km/h
distance = 245km
time taken = 245/35 = 7hrs
time of brakes = 1/2hr.
no of brakes = 2
total time of brakes 1hr
total time to reach the town = (7+1)hr = 8hrs
your answer is 8hrs.
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