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joravar choudhary

· started a discussion

· 1 Months ago

wrong solution (Question: 195272.0 )

answer must be 8/3

Question:
A boat goes 8 kms an hour in still water, but takes twice as much time in going the same distance against the current. The speed of the current (in km/hr) is –
Options:
A) 2 km/hr
B) 4 km/hr 
C) 3 km/hr 
D) 5 km/hr 
Solution:
Ans: (b) 

Let the speed of the current be x km/hr

\(\cfrac{8}{8 -x}\) = 2

8 = 16 – 2x

2x = 8

x = 4 km/hr

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