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anjali gupta 9 years ago

speed of faster boat=a
speed of slower boat=b
speed of stream=x
time= dist/speed
downstream,
1.5*d/(a+x) = d/(b+x)
since speed of a downstream= a+x
and of b = b+x
on solving u get,
3(b+x)=2(a+x).. eq 1

upstream,
speed of a= a-x
speed of b= b-x
d/(a-x)=d/(2*(b-x))
on solving u get,
a-x=2(b-x).. eq 2

distance = speed * time
1*(a-b)=8
a=8+b.. eq 3

put a=8+b in eq 1
u get,
b=16-x
put this value of b in eq 2
u get x=4, b=12, a=20
Answer is 20 which is speed of faster boat :)

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sindhuja to jai Narayan Mishra 9 years ago

can u solve this for me plz
Two boats go downstream from point X to point Y. The faster boat covers the distance from X to Y 1.5 times as fast as the slower boat. It is known that for every hour the slower boat lags behind the faster boat by 8 km. However, if they go upstream, then the faster boat covers the distance from Y to X in half the time as the slower boat. Find the speed of the faster boat in still water.

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sindhuja to anjali gupta 9 years ago

HI , can u solve this for me
7.Two boats go downstream from point X to point Y. The faster boat covers the distance from X to Y 1.5 times as fast as the slower boat. It is known that for every hour the slower boat lags behind the faster boat by 8 km. However, if they go upstream, then the faster boat covers the distance from Y to X in half the time as the slower boat. Find the speed of the faster boat in still water.

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sindhuja 9 years ago

can anyone solve this for me plz

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sindhuja 9 years ago

7.Two boats go downstream from point X to point Y. The faster boat covers the distance from X to Y 1.5 times as fast as the slower boat. It is known that for every hour the slower boat lags behind the faster boat by 8 km. However, if they go upstream, then the faster boat covers the distance from Y to X in half the time as the slower boat. Find the speed of the faster boat in still water.

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