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OverLord2011 [107]
2 years ago
12

If Jeff washes his car in 6 minutes and bob washes the same car in 8 minutes. How long does it take both of them to wash the sam

e car?
Mathematics
2 answers:
Tatiana [17]2 years ago
8 0

Answer:

3 3/7 or 24/7 mins

Step-by-step explanation:

Let total job = X

Jeff's rate = X/6

Bob's rate = X/8

Combined rate = X/6 + X/8

(4X × 3X)/24 = 7X/24

7X/24 = X/T

T = X ÷ (7X/24)

T = X × (24/7X)

T = 24/7 mins

Shortcut:

T = product of individual times/sum of individual times

T = (6×8)/(6+8)

T = 48/14

T = 24/7

T = 3 3/7 mins

pishuonlain [190]2 years ago
4 0

Answer:

3 3/7 minutes or 3.4mins

Step-by-step explanation:

If Jeff washed husband car in 6 minutes and Bob washed the same car in 8 minutes , the time taken by both of them in washing the car ?

If Jeff washed the car in 6 minutes , in one minute, Jeff’s work = 1/6

If bob washed in 8mins, in one minute, bob’s work = 1/8

Add both together

1/6 + 1/8

Lcm of 6 and 8 Is 24

Divide the Lcm by the denominators and multiply the results by the numerator

We have 4+3 /24

7/24

Therefore time taken by both of them in Washing is 24/7

= 3 3/7 minutes 0r 3.4mins

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Answer:

Dividing mixed numbers is very similar to multiplying mixed numbers. You just add one step—after changing the divisor into an improper fraction, you then find its reciprocal and multiply. ... First step: Write the whole number and the mixed number as improper fractions.

Step-by-step explanation:

4 0
2 years ago
Mike got a 45% discount when he bought a new jacket. Which of the following is NOT equivalent to 45%?
MariettaO [177]

Answer:

4/5 is NOT equivalent to 45%

Step-by-step explanation:

4/5 = 80%

4 0
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June starts a savings account and puts $1,500 in it. She ears a compound interest of 3% in 3 years. How much is the balance?
MrMuchimi

Answer:

$1,635

Step-by-step explanation:

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6 0
2 years ago
Denise and Jacqueline are training for a swimming and running race.
bezimeni [28]

Answer:

Jacqueline runs at 6.25 minutes per mile

Step-by-step explanation:

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The time for which Jacqueline swims = 30 minutes

Therefore, the time in which Jacqueline runs = 54 min. - 30 min. = 20 minutes

Therefore the equation for Jacqueline's speed = Distance/Time we have

Jacqueline's pace = 3.2 miles/20 minutes = 0.16 miles/minute

Therefore Jacqueline's pace = 0.16 miles/minute

The equation for Jacqueline's pace in miles/minute is presented as follows

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Jacqueline's pace in miles/minute  = 1/0.16 miles/minute = 6.25 minutes/mile.

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When a researcher needs to compare means for a variable grouped into two categories based on some less-than interval variable, a
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You already have an experience with the basic principles behind a t-test if you’ve tried to communicated with a distracted teenager.</span>

8 0
3 years ago
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