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7 If 12 chocolate bars cost 180, what would be the cost of 30 chocolate
for
est
bars?

The chapter is ratio and proportion and I am in 6 th grade pls help

Respuesta :

pravagyawali5

Answer:

12 chocolate bar cost rs 180

1 chocolate bar cost rs 180÷12

= rs 15

The cost of 30 chocolate bar cost = 15×30

=rs 450

|| Question ||

If 12 chocolate bars cost Rs. 180, what would be the cost of 30 chocolate bars?

|| Answer ||

12 chocolate bars cost = Rs. 180

Cost of 30 chocolate bars = x

[tex] \frac{12}{180} = \frac{30}{x} [/tex]

12:180 = 30:x

Means = Extremes

180 × 30 = 12 × x

[tex]x = \frac{180 \times 30}{12} [/tex]

( 3 × 4 = 12, 3 × 10 = 30)

[tex]x = \frac{180 \times 10}{4} [/tex]

( 4 × 45 = 180)

[tex]x = \frac{45 \times 10}{1} [/tex]

[tex]x = 45 \times 10[/tex]

[tex]x = 450[/tex]

Therefore, 30 Chocolate Bars Costs Rs.450.

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