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Bad White [126]
3 years ago
14

If you are driving 60km/h and you speed up to 70km/h over a period of 5 seconds, what is

Mathematics
2 answers:
lbvjy [14]3 years ago
8 0

Answer:

Step-by-step explanation:

solution:

            Data,

                      driving speed of car intially velocity at = Vi = 60km/h

                      the speed was then raised to final velocity at = Vf = 70km/h

                       the total period of speed raised = t = 5 sec

            Req,    acceleration = ?

                     put the formulae :  a =  Vf - Vi/t

                            a = 70 - 60/5

                             a =<em>  2 m/sec2 ans</em>

  • / means divided by,                  

                     

quester [9]3 years ago
5 0

Answer:

fast as heck 0.o (i think 170

Step-by-step explanation:

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Leona [35]

The outlet pipe will take 18 hours to empty the tank.

St<u>ep-by-step explanation:</u>

Number of hours taken by inlet pipe to fill the tank=6

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work done by the inlet pipe in 1 hour with outlet  pipe open=1/9

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The inlet and outlet pipe does the opposite work.

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6 0
3 years ago
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3 0
3 years ago
A triangle has two sides measuring 16 and 21. The included angle is 116°. What is the length of the side opposite the 116° angle
Crank

Answer:

Length of the side opposite to angle 116^{\circ} is 31.49

Step-by-step explanation:

Included angle can be defined as the angle in between two sides of the triangle.

So angle 116^{\circ} is in between sides 16 and 21.

Refer to the attachment for triangle diagram.

To find the length of opposite side, use cosine rule as follows

a^{2}=b^{2}+c^{2}-2\:b\:c\cos\left(A\right)

From the diagram, b = 21,c = 16,\angle A=116^{\circ}

Substituting the values in the formula,

a^{2}=\left(21\right)^{2}+\left(16\right)^{2}-2\left(21\right)\left(16\right)\cos\left(116\right)

Simplifying,

a^{2}=441+256-225792\left(-0.44\right)

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Taking square root on both sides,

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Therefore length of third side is 31.49

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Step-by-step explanation:

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