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Ram was travailing back from his friend house in his old
ambassador. He could only travel along at a steady 30 miles
per hr and managed a paltry 20 miles per litere of fuel. At
the start of the journey he has placed exactly 10 litre of
fuel into a tank. He knew though that the fuel tank lost
fuel at the rate of half a liter per hhour. As ram arrived
home the car stopped because it had run out of a fuel and h
only just made it. How far was his friends house from rams.
a.200 b.150 3.210 d170
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Answer Posted / vandana gopal
Ram is travelling at 30 miles per hour. If time taken to
reach destination is t then total distance d=30*t.
Per hour he loses half liter so in t time he loses t/2
litre.
Thus useful fuel = 10-t/2.
He can do 20 miles per liter so distance covered
d = 20*(10-t/2).
thus
20*(10-t/2)=30*t
t=5
d=150 km.
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