Question

т Ploom Lokmth 11 km/h (10+1) kach liema tomin 10oom bomin 200m 2 to x 200 1000 z (2 min 12 min = room 6 mins 200 x 6 = loom N.
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Answer 1

Answer:

$\huge \mathcal \colorbox{pink}{{ \color{yellow}{❀PêRfèCt ÀnsWër}}}$

Let the speed of the motor boat in still water be x kmph.

Speed downstream = (x+2) kmph

Speed upstream = (x-2) kmph

Therefore,

x−2

10

+

x+2

10

=

60

55

x−2

1

+

x+2

1

=

600

55

=

120

11

11x

2

−240x−44=0

(x−22)(11x+2)=0

x=22

Therefore, speed of motor boat in still water = 22 kmph

Answer 2

22 kmph is your correct answer.

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