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Q.

Two mobiles cost 16,000 rupees. How much money will be required to buy 13 such mobiles?


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a

Rs. 1,04,000

b

Rs. 2,04,000

c

Rs. 3,04,000

d

Rs. 4,04,000

answer is A.

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Detailed Solution

Concept-
We shall apply the unitary technique in these types of issues. After first attempting to calculate the cost of one mobile phone, we will proceed to increase that cost by 13 to calculate the cost of 13 similar mobile phones.
Considering that two cell phones cost 16,000 rupees. We must ascertain the prices of 13 similar mobile phones. We will initially look for the price of one mobile phone in order to determine this.
Provided that the price of two mobile phones is given as, we will use the unitary technique to get the cost of one mobile phone.
Two cell phones cost 16,000 Rupees.
Consequently, 1 mobile phone costs =16000 ÷  2 = Rs 8000
Thus, we learned that a single mobile costs Rs. 8000.
In order to determine the cost of these 13 mobile phones using the unitary technique,
13 mobiles at 8,000 each equals= 13×8000= Rs. 1,04,000.
13 mobiles will therefore cost =  Rs. 1,04,000.
Therefore, the price of 13 of these mobile phones is Rs. 1,04,000.
Hence, the correct option is 1) Rs. 104000
 
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