Boat A covers z z z km upstream in 9 hours. Boat B's upstream speed is equal to Boat A's downstream speed, and Boat B covers m m m km downstre...

Banking SBI PO Prelims Medium Simplification/ Approximation MCQ

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Boat A covers $z$ km upstream in 9 hours. Boat B's upstream speed is equal to Boat A's downstream speed, and Boat B covers $m$ km downstream in 1 hour. The speed of Boat B in still water is $(m - 4) \text{ km/hr}$ , and the speed of Boat A in still water is $8 \text{ km/hr}$ . Find the correct relation(s) between $z$ and $m$ from the following:

(i) $\frac{z}{m} = \frac{9}{5}$

(ii) $m + z$ is an even number

(iii) $z < m$

Options

Both (i) and (iii)

Only (i)

Only (ii) and (i)

All incorrect

All are correct

boat and streamspeedupstreamdownstreamratiorelation

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Boat A covers z z z km upstream in 9 hours. Boat B's upstream speed is equal to Boat A's downstream speed, and Boat B covers m m m km downstre...