Question

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

Answer 1

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

Answer 2

|| 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

`(12)/(180) = (30)/(x)`

12:180 = 30:x

Means = Extremes

180 × 30 = 12 × x

`x = (180 * 30)/(12)`

( 3 × 4 = 12, 3 × 10 = 30)

`x = (180 * 10)/(4)`

( 4 × 45 = 180)

`x = (45 * 10)/(1)`

`x = 45 * 10`

`x = 450`

Therefore, 30 Chocolate Bars Costs Rs.450.