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Korolek [52]
3 years ago
12

A boy of 30 kg is carrying a load of 20 kg to the top of a building of height 13m . Find his total work done . If he can do it i

n 20 second calculate the power developed by him .​​
Mathematics
1 answer:
r-ruslan [8.4K]3 years ago
5 0

Step-by-step explanation:

g of load= 30 kg ( kilogram)

load at top of building=20 kg( kilogram)

building height=13 m(meter)

<h2>or"= total work done=?</h2>

<h3> or"=. power developed by him= ? </h3>

now ,

30*20*13÷20

again ,30*20*13

________

20

answer,= 390

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Answer:two dimensional shapes

Step-by-step explanation:

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3 years ago
A straight slide in a playground design makes an isosceles triangle with the
julia-pushkina [17]

Answer:

Option D.

Step-by-step explanation:

  • First, the you need ti understand that the triangle is an isosceles right angled triangle. In other words, the base and height are equal in length. The third side is the slide. This is the longest side.
  • Next, we know that the formula for calculating the area of a right angled triangle is given by:

        A = 1/2 (base × perpendicular height)

  • The perpendicular height is equal to the base. Let's say the base is <em>x</em>. It means that the height is also x, since height = base.
  • Therefore, the formula will be:

       A = 1/2 (x.x)

           =1/2 (x²)

      32 = 1/2 (x²)

     Multiplying both sides by 2 gives:

     32×2 = x²

     64  = x²

       8   = x

To find the third side, we use the Pythagoras theorem:

    C² = A² + B²

         = 8² + 8²

         = 128

   C = √128

       = 8√2

However, the answer will not be exact, so we  multiply the length of the base and height by 2. This gives x = 16 (Length of base = length of height)

Repeating the steps above gives C = √ (16)² + (16)²

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This corresponds to option D.

3 0
3 years ago
Arithmetic??????????????????
wel

good lesson and good day ^-^

7 0
3 years ago
Is it C or no? Can u help please
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7 0
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Answer:

The correct answer is two designs are used 12 times each and other four designs are used for 13 times each.

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Width of the quilt Lu is making is 18 rows of 20 squares each.

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We can also say there are 76 square as the boundary which are to be bordered with toy designs.

Each square can hold 1 design of toy and there are 6 different designs of toys.

Thus number of times each design is used \frac{76}{6} = 12 \frac{4}{6}.

Thus there are two designs used 12 times each and other four designs are used for 13 times each.

3 0
3 years ago
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