On an 80 km straight road the bus travels the first 40 km with a uniform speed of 30km/h How fast must the bus travel the next 40km to have an average speed of 40 km/h for the entire trip
Answers
Answered by
1
Answer:
50
Explanation:
if the bus travels at 50 kmph its average speed will constitute as 40kmph
aamishhussain7:
can you expain
just add the 2 speeds and divide it by2
thanks
average is the ratio of sum and number of variable available
it will be 60
Answered by
1
Average speed=2*V1*V2/(V1+V2)
(This formula is only applicable when distance is in 2 equal halves)
Let V2 be ‘x’
=>40=2*30*x/(30+x)
=>1200+40x=60x
=>60x-40x=1200
=>20x=1200
=>x=1200/20
=>x=60km/h
The bus should travel with a speed of 60km/h for the next 40km to have an average speed of 40km/h
(This formula is only applicable when distance is in 2 equal halves)
Let V2 be ‘x’
=>40=2*30*x/(30+x)
=>1200+40x=60x
=>60x-40x=1200
=>20x=1200
=>x=1200/20
=>x=60km/h
The bus should travel with a speed of 60km/h for the next 40km to have an average speed of 40km/h
confused one is saying 50 and you are saying 60
It will be 60
Pls refer to the calculations
actually i have not even learned this formula
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