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Question

(10052.8)7.2=  ?



A

42

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B

40

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C

39

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D

30

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Solution

The correct option is A

40


We know that,
(xy)z=x(y+z), for all numbers x, y and z.

Since, the above is true for all the numbers, it must be true for x=100, y=52.8 and z=7.2.

So, (10052.8)7.2
=100(52.8+7.2)
=10060=40


Mathematics

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