Question

If 5 kg of sugar costs Rs. 160, find the cost of 7 kg of sugar.

Answer 1

Answer:

Given,

5kg costs Rs.160

Find,

the cost of 7 kg sugar

Step-by-step explanation:

Since,

the cost increases when the weight increases, this is a case of direct variation.

=> (ratio of the weights) = (ratio of the corresponding costs)

=> 5/7 = Rs.160/x , where x is the cost of 7 kg of sugar.

=> x = 7/5* Rs.160

=> x = Rs.224

Here, 7/5 is the multiplying ratio.

Answer 2

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GIVEN:

Cost of 5kg of sugar = Rs.160

Cost of 7kg of sugar = ?

Solution:

First we have to find cost of 1kg of sugar.

So

=> 160/5

=> 32

Cost of 1kg of sugar is Rs.32

Now to find cost of 7kg sugar multiply 32 with 7.

=> 32 × 7

=> 224

So cost of 7kg of sugar is Rs.244.