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antoniya [11.8K]
2 years ago
13

A railway engine is of mass 72tonnes and 11m long. An exact scale model is made of it and is 44cm long. find the mass of the mod

el​
Mathematics
2 answers:
jolli1 [7]2 years ago
7 0

Answer:

46 will be converted to .44m

x will be the mass of the 44 cm engine

x/72  =  .44^3/11^3

x/72 = 0.085/1331

cross multiply

1331x = 72 x 0.085

1331x = 6.12

x= 6.12/1331

=0.004598

x = 0.004598  tonnes

change to kilograms

0.004598*1000 = 4.6 kg

34kurt2 years ago
4 0

Answer:

it is correct

Step-by-step explanation:

2000 N

The resistance force acting is 1N per ton.

Tension in the coupling between engine and the wagon is 2000N.

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Answer:

Probability that first shirt is white and second shirt is gray if first shirt selected is set aside = \frac{1}{4}

Step-by-step explanation:

Given that

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P(First\ White\ and\ second\ gray) = P(First White) \times P(Second\ Gray)\\\Rightarrow P(First\ White\ and\ second\ gray) = P(First White) \times \dfrac{\text{Number of gray shirts}}{\text{Total number of shirts left}}\\\\\Rightarrow P(First\ White\ and\ second\ gray) = \dfrac{3}{10} \times \dfrac{5}{9}\\\Rightarrow P(First\ White\ and\ second\ gray) = \dfrac{1}{2} \times \dfrac{1}{2}\\\Rightarrow P(First\ White\ and\ second\ gray) = \bold{\dfrac{1}{4} }

So, the answer is:

Probability that first shirt is white and second shirt is gray if first shirt selected is set aside = \frac{1}{4}

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2 years ago
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