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A man complete a journey in 10 hours. He travels first half of the journey at the rate of 21 km/hr and second half at the rate of 24 km/hr. Find the total journey in km.
Let's total time=t=10 hrs= 600 min............(i)
total distance travelled=x
Speed=s1=21 km/hr= 0.35 km/min..............................(iii)
s2= 24 km/hr= 0.4 km/min.................................(iv)
600 = [( x/2) / 0.35] + [( x/2) / 0.4]
600 = x/2* [ 2.857 + 2.5 ]
x = 600*2 / 5.357
x = 224 km
10*60=[(x/2)/(21/60)]+[(x/2)/(24/60)]..............convert hrs in min
ans is total journey 1600km
let x is total distance
(1/2)*x/21 + (1/2)*x/24 = 10
x/21+ x/24 = 20
15x = 168*20
x =(168*20)/15= 224 km.
Barry is driving back home to Sue after a weekend away. If he travels at an average speed of 60kmph, the journey will take 40min longer then if he traveled at an average speed of 15kmph faster.
How far apart have Barry and Sue been this weekend?
Ram travels a certain distance at 3km/hr and reached 15 min late. If he travels at 4 km/hr, he reached 15 min earlier.
What is the distance he has to travel.
A man travels 370km partly by train and partly by bus.
If he covers 250km by train and rest by bus it takes him 4 hours but if he travels 130km by train and rest by bus he takes 18 minutes longer find the speed of train and that of bus?
Pramod travels for 14 hours 40 min. He covers one half of the journey by train at 60 kmph and the rest half by road at 50 kmph. What is the total distance traveled by Pramod (in km)
Two stations A and B are 110 km apart on a straight line. One train starts from A at 7 a.m. and travels towards B at 20 kmph. Another train starts from B at 8 a.m. and travels towards A at a speed of 25 kmph. At what time will they meet?
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