A) Rs. 70
B) Rs. 105
C) Rs. 140
D) Rs. 175
Correct Answer: C
Solution :
[c] Let the savings of A and B are Rs. 4x, Rs. 5x and the share in cost of gift are Rs. 3y, Rs. 4y respectively. According to the question, For A, \[4x-3y=\frac{2}{3}\times 4x\] \[\Rightarrow \] \[x=\frac{9y}{4}\] (i) For B, \[5x-4y=145\] \[\Rightarrow \] \[5\times \frac{9y}{4}-4y=145\] [by Eq. (i)] \[\Rightarrow \] \[y=20\] \[\therefore \] Cost of gift \[=3y+4y\] \[=7\times 20=\text{Rs}\text{.}\,\,140\] |
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