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ololo11 [35]
2 years ago
6

A car travels a distance of 230 miles in a time of 4.2 hours. What is its average speed rounded to 1dp?

Mathematics
2 answers:
zhannawk [14.2K]2 years ago
5 0

Its  average speed rounded to 1dp is 54.76 miles per hour.

<h3>Average speed</h3>

Using this formula

Average speed=Distance/Time

Where:

Total Distance =230 miles

Time= 4.2 hours

Let plug in the formula

Average speed=230/4.2

Average speed=54.76

Inconclusion Its  average speed rounded to 1dp is 54.76 miles per hour.

Learn more about average speed here:brainly.com/question/4931057

pashok25 [27]2 years ago
3 0

\large \sf \underline \bold { \color{violet}Given :}

  • Total Distance Traveled = 230 miles.

  • Time Taken In Travel = 4.2 hours.

\large \sf \underline \red{Now,  \: By \:  Avarage \:  Speed \:  =  \frac{Distance}{Time}  }

  • \large \sf    = \frac{230}{4.2}

  • \large   \boxed{  \sf   \orange{54.76 \: m/h}}

<h3>Hope It's Helps!</h3>
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Step-by-step explanation:

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|3| = 3

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Tublu buys a cylindrical water tank of height 1.4m and diameter 1.1m to catch rainwater off his roof. He has a full 2 litres tin
vesna_86 [32]

Answer:

Yes, he will have enough paint to cover the tank with one layer of paint.

Step-by-step explanation:

We are given that Tublu buys a cylindrical water tank of height 1.4 m and diameter 1.1 m to catch rainwater off his roof. He has a full 2 liters tin of paint in his store and decides to paint the tank (not the base).

He uses 250 ml to cover 1 \text{m}^{2}.

From the question, it is clear the area of the tank which needs to be painted is the lateral surface area (because the base is not included).

The lateral surface area of the cylinder = 2\pi rh

where, r = radius of the cylinder =  \frac{\text{Diameter}}{2}  = \frac{1.1 }{2} = 0.55 m

           h = height of the cylinder = 1.4 m

           \pi = 3.142 (given)

So, the lateral surface area of a cylindrical water tank = 2 \times 3.142 \times 0.55 \times 1.4

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Now, it is given in the question that; Tublu uses 250 ml to cover 1 \text{m}^{2} area, this means that;

To cover 4.84 \text{m}^{2} area, he will use paint = 4.84 \times 250 = 1210 ml

Since he has a full 2 liters tin of paint in his store which is equal to 2000 ml but he need only 1210 ml of paint.

This means that yes, he will have enough paint to cover the tank with one layer of paint.

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