Xavier Aptitude Test 2012 Paper

Question : 76 of 85

Marks: +1, -0

Three truck drivers, Amar, Akbar and Anthony stop at a road side eating joint. Amar orders 10 rotis, 4 plates of tadka, and a cup of tea. Akbar orders 7 rotis, 3 plates of tadka, and a cup of tea. Amar pays Rs. 80 for the meal and Akbar pays Rs. 60. Meanwhile, Anthony orders 5 rotis, 5 plates of tadka and 5 cups of tea. How much (in Rs. ) will Anthony pay?

75
80
95
100
None of the above

Validate

Solution:

(d) Let cost of one roti, one tadka, and one tea be

R s . x, y, z

respectively

∴\ 10 x+4 y+z=80

7 x+3 y+z=60

\∴ \ 10 x+4 y=80-z

.......... (i)

7 x+3 y=60-z

.......... (ii)
Solving this, we get

x=z / 2

and

y=20-\ {3}/{2} z

Now we required

5 x+5 y+5 z

=5\ [ {z}/{2}+20-\ {3}/{2} z+z\ ]=5 × 20

=Rs. 100

Hence correct option is (d)

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