Mathematics, 15.02.2020 01:22 jayp02

If he rows with the current, Mishka rows 48 km in 3 hours. If he rows against the current, it takes 4 hours to travel the same distance. Find Mishka's speed and the speed of the current.

Answers: 1

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Answer from: IsabellaGracie

Mishka's speed = 14 km/hrCurrent speed = 2 km/hr

Step-by-step explanation:

Let the speed of rowing be r and speed of current be c.

If he rows with the current, Mishka rows 48 km in 3 hours.

Relative speed = r + c

Distance = 48 km

Time = 3 hours

48 = 3 x ( r+c)

r + c = 16 eqn 1

If he rows against the current, it takes 4 hours to travel the same distance.

Relative speed = r - c

Distance = 48 km

Time = 4 hours

48 = 4 x ( r - c)

r - c = 12 eqn 2

eqn 1 + eqn 2

2r = 28

r = 14 km/hr

Substituting in eqn 1

14 + c = 16

c = 2 km/hr

Mishka's speed = 14 km/hr

Current speed = 2 km/hr

Answer from: Quest

answer:

payment just for service

→

87.12

payment for service including tax

→

94.09

explanation:

service only with 20% tip

→

72.6

(

100

)

87.12

in the opening of the question the word 'service' is associated only with the pretax value.

the closing part of the question asks: how much did she pay for the

service

−−−−−−

so technically the answer is

→

72.6

(

100

)

87.12

however, the intention of the question provider may have been that your answer is to be

87.12

(

100

)

94.09

to 2 decimal places.

payment just for service

→

87.12

payment for service including tax

→

94.09

tony b

mar 21, 2017

answer:

trying to explain it another way

explanation:

service charge

→

72.60

20% tip

100

72.60

14.52

−−−−−−

←

add

87.12

tax

100

87.12

6.97

−−−−−

←

add

94.09

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If he rows with the current, Mishka rows 48 km in 3 hours. If he rows against the current, it takes...

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