A car moves a distance of 200 m. It covers the first half of the distance at a speed of 40 km/h and the second half of distance at speed ‘v’. Calculate the average speed of bus?
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You first need to know what average speed is actually.
Avg Speed = Total distance travelled/ total time
According to the question, the car travels first 100m at a speed of 40km/h. Now here you need to take care of the units too.
Using this, we can calculate the time spent by the car in travelling the first 100 m.
i.e. t1= distance/ speed
t1= 0.1km/40km/h = 0.0025hrs
similarly, the car travels the next 100m at a speed of v km/ h.
t2= 0.1/v
Now we can calculate the average speed of the car.
Avg speed = (0.1+0.1)/(0.0025+0.1/v)
= 0.2/(0.0025+0.1v)
= 2/(0.025+v) km/ hr
This is the required answer, as per the given quantities. Once you have the value of v, you can substitute it her and get the final answer.
Avg Speed = Total distance travelled/ total time
According to the question, the car travels first 100m at a speed of 40km/h. Now here you need to take care of the units too.
Using this, we can calculate the time spent by the car in travelling the first 100 m.
i.e. t1= distance/ speed
t1= 0.1km/40km/h = 0.0025hrs
similarly, the car travels the next 100m at a speed of v km/ h.
t2= 0.1/v
Now we can calculate the average speed of the car.
Avg speed = (0.1+0.1)/(0.0025+0.1/v)
= 0.2/(0.0025+0.1v)
= 2/(0.025+v) km/ hr
This is the required answer, as per the given quantities. Once you have the value of v, you can substitute it her and get the final answer.
uneq95:
that is not mentioned in the question. i have solved with what was provided in the question.
either the answer is in terms of v or your question is wrong or incomplete.
ok thanks
when is a null or empty statement required in c++ can u help me with this too
pls click the heart button
pls click the heart button
empty statement doesnt do anything
you just put a semicolon after a code line
it is used sometimes in loops when we dont increment or decrement the variable and the modification is done in the loop body
for(int i=0; i<7; ;){ loop body}
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