Question 177

The cost of 5 sharpeners and 14 pencils is Rs.56. What would be the cost of 15 sharpeners and 42 pencils ?

Solution

Given , The cost of 5 sharpeners(S) and 14 pencils(P) is Rs 56.

i.e. 5S + 14P = 56 ...... (1)

We need the cost of 15 sharpeners and 42 pencils.

multiplying equ.(1) with 3 on both sides .
we get , 15S + 42P = 56*3

= 168

Hence, none of these.

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