Question

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If 7kg onions cost Rs. 140, how much will 12kg onions cost?

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Answer 1

Answer:

Let us suppose the cost of 12 kg onions is x rupees

The number of onions and their cost vary in direct proportion.

$\frac{7}{140} = \frac{12}{x} \\ \\ = \: x = \frac{12 \times 140}{7} = \: 240 \: rupees$

Hence, the cost of 12 kg onions is 240 rupees

Step-by-step explanation:

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Answer 2

Given:–

• Cost of 7kg onions is Rs. 140

To find:–

• Cost of 12kg onions

Assumptions:–

• Let cost of 12kg of onions be x

Concept:–

• Direct proportion

Step by step explaination:–

As their cost varies.

Calculating using direct proportion..

That is,

7/140 = 12/x

Now cross multiplying...

That is,

x = 12×140 / 7

x = 240

Answer:–

Cost of 12kg onions is Rs. 240