Question

A boat can travel 14.4 km downstream in 32 minutes. if the speed of the current is kmph, how much time


will the boat take to travel 84 km upstream?

Answer 1

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հίί ʍαtε_______✯◡✯
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һєяє' ʏȏȗя ѧṅśwєя ʟȏȏҡıṅɢ ғȏя________
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✯using the formula,

♦Take Time = distance /speed

♦Let the speed of boat in still water : X km/h

♦Streams speed = 3 km/h

❶.Downstream

14.4/(X + 3) = 32/60
32(X + 3) = (60 x 14.4)
32X + 96 = 864
32X = 864 - 96
32X = 7 68
X = 768 / 32
X = 384 / 16
X = 192 / 8
X = 96 / 4
X = 24
♦Therefore the speed of boat in still water = 24 km/h

❷Upstream:--

▶84 / (24 - 3)
= 84 / 21
= 4 h
$Time \: taken \: during \: upstream \: is \: 4 \: hours$
$hope \: it \: helps$

★★BRAINLY★★

Answer 2

✯using the formula,

♦Take Time = distance /speed

♦Let the speed of boat in still water : X km/h

♦Streams speed = 3 km/h

❶.Downstream

14.4/(X + 3) = 32/60

32(X + 3) = (60 x 14.4)

32X + 96 = 864

32X = 864 - 96

32X = 7 68

X = 768 / 32

X = 384 / 16

X = 192 / 8

X = 96 / 4

X = 24

♦Therefore the speed of boat in still water = 24 km/h

❷Upstream:--

▶84 / (24 - 3)

= 84 / 21

= 4 h

Time \: taken \: during \: upstream \: is \: 4 \: hoursTimetakenduringupstreamis4hours