A train is 1000 metres long. It is travelling at a constant speed, and approaches a

Mathematics

1 answer:

jolli1 [7]3 years ago

4 0

Answer:

240kmh

Step-by-step explanation:

The distance that the train traveled in 30s is the difference of the total length of the tunnel and the train (2000m). This means it travels 2000m/30s. This ratio is the same as 240000/3600s or 240km/1hr.

You might be interested in

Ella collects 50 bottles to recycle. Of the bottles she collects, 19 are plastic and the rest are glass.

nekit [7.7K]

QUESTION A

The total number of bottles Ella collected is
$50$

The number of bottles that are plastic is

$19$

The percentage of bottles that are plastic is

$= \frac{number \: of \: plastic \: bottles}{total \: number \: of \: bottes} \times 100\%$

$= \frac{19}{50} \times 100\%$

$= 19 \times 2\%$
$= 38\%$

Therefore 38% of the bottles are plastic.

QUESTION B

The total number of bottles that are glass is
$50 - 19 = 31$

The total number of bottles Ella collected is
$50$

The percentage of bottles that is glass is
$= \frac{number \: of \: glass \: bottles}{total \: number \: of \: bottles} \times 100\%$

$= \frac{31}{50} \times 100\%$

$= 31 \times 2\%$
$= 62\%$

Therefore 62% of the bottles are glass

8 0

3 years ago

Carrie is searching online for airline tickets to weeks ago the cost to fly from Hartford to Boston was 210 now the cost is $350

padilas [110]

Answer:

It is a 40% increase

Step-by-step explanation:

So first of all the formula is

New-old/old

Or rate of change/ original

SO th new is 350

THe old is 210

350-210=140

140/350 which is old is 2/5

2/5 is 40 percent

So 40 percent increase

4 0

3 years ago

Read 2 more answers

Evaluate the expression 5 3 =

alina1380 [7]

Answer:

Do you mean to multiply? you don't have any sign. if you meant multiply its 15, if you meant divide it's 1 2/3, if it's addition it's 8, if its subtraction it's 2

8 0

3 years ago

0.6 can be written as the fraction

natulia [17]

Answer:

0.6 = $\frac{6}{10}$