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27. A traveller walks a certain distance; had he gone half a km anhour faster, he would have walked it in four-fifths of the time: had hegone half a km an hour slower, he would have been 23 hours longeron the road. Find the distance |
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Answer» Solution:Formula:speed(s)*time(t)=distance(d) walked 1/2km with time 4/5(s+0.5)((4/5)+t)=d --->(1)1/2km an hour slow, walked 2and half hr long(s-0.5)(t+2.5)=d ----->(2)solving (1) & (2)we get s=2t=7.5d=2*7.5=15km |
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