If 7 liters of petrol cost $14.70, calculate the cost of 15 liters of petrol.

The cost of 15 liters of petrol if 7 liters cost $14.70 is $31.50

To calculate the cost of 15 liters of petrol if 7 liters of petrol cost $14.70,

First, we will determine the cost of 1 liter of petrol.

From the question,

7 liters of petrol cost $14.70

That is,

7L = $14.70

Then,

1 L = $14.70 ÷ 7

1 L = $2.10

∴ The cost of 1 liter of petrol is $2.10

Now, for the cost of 15 liters of petrol, we will multiply the unit price ($2.10) by 15

That is,

The cost of 15 liters of petrol = 15 × $2.10

∴ The cost of 15 liters of petrol = $31.50

Hence, the cost of 15 liters of petrol if 7 liters cost $14.70 is $31.50

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Hi

7 = 14.70

15= X

so :  X =  15*14.70 /7 = 31.5

15 liters  of petrol cost  31.5

use an equation of ratios to determine the amount of gas needed to fill the tank.

    0.2             0.8

  =    

288.75             x

                                                              231 gal

so, 0.2x = (0.8)(288.75 gal), and x = = 1155 gal.

                                                                0.2

it would take 1155 gal. to fill the tank.

the cost would be

1155 gal         $3

* = $3465   (answer)

      1           1 gal

hope this you

a. 12.5 kg

step-by-step explanation:

f = ma

so

m = f/a = (2500 n)/(200 m/s²) = 12.5 kg

1 n = 1 kg·m/s²