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Q.

Is it true that the product of $392 × 138$ to the nearest hundred is 42000.

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a

True

b

False

answer is B.

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Detailed Solution

Rounding off 392 to the nearest hundred;
The number placed at ten's digit is 9 and greater than 5.
So, after rounding off 392 to the nearest hundred it is equal to 400.
Similarly rounding off 138 to the nearest hundred;
The number placed at ten's digit is 3 and smaller than 5.
So, after rounding off 138 to the nearest hundred it is equal to 100.
Let’s calculate the product of the two numbers;

400 × 100 = 40000

Thus, the statement is false.
The product of two numbers is equal to 40000.
Hence, option 2 is correct.

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