What is the speed of the boat in still water?
Statement I. The boat travels at the speed of 12 km/h upstream.
Statement II. The boat travels at the speed of 18 km/h downstream.
From statement I x – a = 12 km/h……………………..(i) From statement II x + a = 18 km/h ……………………(ii) From eq. (i) and (ii), we get ∴ a = 3 km/h & x = 15kmph Hence, data given in both statements are necessary.
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