Question

The time taken by the boat to cover (d+130) km distance in downstream is 1.9 hours less than the time taken by the same boat to cover (d-45) km distance in upstream. The same boat can cover (d+20) km distance in still water in 11.75 hours. If the speed of the stream is 75% less than the speed of the boat, then find out the value of ‘d’.

A 560
B 520
C 440
D 480
E None of the above
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