Question

Anjali went to an ice cream parlour and bought same types of 5 ice creams. She paid Rs. 125 to the shopkeeper. The next day she again went to the same parlour and ordered same three ice creams.So,how much will she pay for3 ice creams​

Answer 1

Answer:

Hint: Using the given information find the cost of 1 ice cream by using the unitary method. Now, multiply both sides of the relation by 10 and simplify the right-hand side to find the total cost of 10 ice creams.

Complete step-by-step solution:

Here, we have been provided with the information that the cost of 9 ice creams is Rs. 67.50 and we have to find the cost of 10 ice creams. So, we have,

Cost of 9 ice creams =Rs.67.50

So, applying the unitary method and dividing both sides with 9, we get

⇒ cost of 1 ice cream =Rs.67.509cost of 1 ice cream =Rs.7.5

Now, multiplying both sides with 10, we get,

⇒ cost of 10 ice cream=Rs.7.5×10

⇒ cost of 10 ice cream=Rs.75

Hence, the total cost of 10 ice creams is Rs. 75.

Note: One may note that we have applied the basic unitary method to solve the question. Actually, this question is from the topic ‘ratio and proportion’. There can be another method also to solve the question. What we can do is we will assume the cost of 10 ice creams as ‘x’ rupees. Now, we will write the given information in proportion form as 9 ice

Step-by-step explanation:

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Answer 2

Given:

No. of ice-creams Anjali bought = 5

Amount paid for the ice-creams = Rs 125

No. of ice-creams Anjali bought the next day = 3

To find:

Amount paid for 3 ice-creams.

Solution:

For 5 ice-creams of the same kind, Anjali paid Rs 125. From this, we can calculate the cost of one ice-cream by dividing the the total cost she paid for five ice-creams of the same kind with the number of ice-creams she bought i.e., 5.

Cost of 5 ice-creams = Rs 125

Cost of 1 ice-cream = $\frac{125}{5}=25$

∴ Cost of one ice-cream is Rs 25.

The next day she buys the same ice-cream in 3 numbers, for which she has to pay Rs 25 for each. Cost of 3 ice-creams can be obtained by multiplying no. of ice-creams bought with the cost of one ice-cream.

Cost of 1 ice-cream = Rs 25

Cost of 3 ice-creams = $3$ × $25=75$

∴ Cost of 3 ice-creams of the same kind Anjali buys is Rs 75.

Anjali pays Rs 75 for the 3 ice-creams.