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If the cost of 10 pencils is Rs 90, then the cost of 19 pencils is ?

  1. 123
  2. 156
  3. 132
  4. 171

Answer (Detailed Solution Below)

Option 4 : 171

Detailed Solution

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Given:

10 pencil = Rs.90

Solution:

1 pencil = 90/10 = Rs.9

19 pencils = 19 x 9 = Rs. 171

If the cost of 10 pencils is Rs 90, then the cost of 19 pencils is Rs 171. 

Hence, the correct option is 4.

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