Question

10 litres of water mixed with 40 litres of milk at 84p. a litre. How much will be the
profit or loss by selling the whole quantity at 66p. Per litre?​

Answer 1

Given:-

• Total Quantity of milk=40 litres
• per litre rate of milk by purchasing=84p
• per litre rate of milk by selling=66p

To Find:-

• Profit or loss by selling the whole quantity

Solution:-

• At first calculate the total quantity of milk than calculate amount of selling and purchasing after that calculate profit or loss here]

Total quantity=Quantity milk+Quantity water

Total quantity=40+10=50 litres

• Now calculate here purchasing amount]

Total amount after purchasing quantity]

Total amount=84×40=3360p

• Than calculate here selling amount]

Total amount after selling quantity]

Total amount=66×50=3300p

• It's clearly mentioned above that Selling amount is less than purchasing amount so, we will get loss here]

Loss=Purchasing amount-Selling amount

Loss=3360-3300=60p

Hence,

we will get loss of 60p by selling the whole quantity.

Answer 2

$\bigstar$ Given :

• 10 litres of water mixed with 40 litres of milk is purchased at 84 p per litre

$\bigstar$ To Find :

• Profit or loss by selling whole quantity of milk at Rs.66 per litre

$\bigstar$ Solution :

First of all we need to find total selling price at 84 p per litre .

$\bigstar$ Case - 1 :- At 84 p per litre [ Purchasing price ]

⇒ Total quantity = Quantity of water + Quantity of milk

⇒ Total quantity = 10 + 40 litres

⇒ Total quantity = 50 litres

For 1 litre it costs 84 p per litre.

So , For 50 litres ,

⇒ 50 × 84 = 4200

So the purchasing price at 84 p per litre is Rs.4,200

Now we need to find total selling price at 66 p per litre

$\bigstar$ Case 2 :- At 66 p per litre [ Selling price ]

It is clearly a loss , as the rate per litre decreases .

So selling price at Rs.66 per litre is ,

⇒ 50 × 66

⇒ 3300

So the selling price at 66 p per litre is 3,300 p

So ,

⇒ Loss = Purchasing price - Selling price

⇒ Loss = 4200 - 3300

⇒ Loss = 900

So the loss is 900 p