Question

The cost of 15.5 litres of milk is Rs 395.25. Find the cost of one litre of milk and also the cost of 30 litres of milk.

Answer 1

Question

The cost of 15.5 liters of milk is Rs 395.25. Find the cost of one liters of milk and also the cost of 30 liters of milk.

Solution

Given :-

• The cost of 15.5 liters milk is Rs 395.25

Find :-

• the cost of one liters milk
• the cost of 30 liters milk

Explanation

Here,

∵ Cost price of 15.5 liters milk = 395.25

•°• Cost price of 1 liters milk = 395.25/15.5

•°• Cost -----" ------" -------" = 39525/1550

•°• Cost------"------"---------" = 25.5 Rs

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Now, Calculate Cost price of 30 liters milk

∵ Cost price of 1 liters of milk = 25.5 Rs

•°• Cost price of 30 liters milk = 25.5 × 30

•°• Cost price of 30 liters milk = 765.0

•°• Cost price of 30 liters milk = 765 Rs

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Hence

• Cost price of 1 liters milk = 25.5 Rs
• Cost price of 30 liters milk = 765 Rs

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Answer 2

GIVEN:

• The cost of 15.5 litres of milk is Rs 395.25.

TO FIND:

• Find the cost of one litre of milk and also the cost of 30 litres of milk.

SOLUTION:

We have given that, the cost of 15.5 litres of milk is Rs 395.25

Firstly, we have to find the cost of one litre of milk

According to question:-

$\rm{\rightharpoonup 1 \: litre = \dfrac{395.25}{15.5}}$

$\rm{\rightharpoonup 1 \: litre = \cancel\dfrac{395.25}{15.5}}$

$\bf{\rightharpoonup \star \: 1 \: litre = Rs. 25.5 \: \star }$

❝ The cost of 1 litre milk is Rs. 25.5 ❞

Now, we have to find the cost of 30 litres of milk

According to question:-

$\rm{\rightharpoonup 30 \: litres = 25.5 \times 30 }$

$\bf{\rightharpoonup \star \: 30 \: litres = Rs. 765 \: \star }$

❝ The cost of 30 litres milk is Rs. 765 ❞

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