56.
The cost of 16 packets of salt, each weighing 900 grams is Rs. 28. What will be
the cost of 27 packets, if each packet weighs 1 kg?
[A]
Rs. 52.50
[C]
Rs. 58.50
[B]
Rs. 56
[D]
Rs. 64.75
Answer : A
Explanation :
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Let
the required cost be Rs. x. Then,
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More
packets, More cost (Direct Proportion)
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More
weight, More cost (Direct Proportion)
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Packets
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16
: 27
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Weight
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900
: 1000
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::
28 : x
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(16
x 900 x x) = (27 x 1000 x 28)
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x =
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(27 x 1000 x 28)
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16 x 900
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=
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=
52.50
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