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Question

Evaluate the expression given below.
25×37 = ___


A
65
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B
635
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C
67
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D
135
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Solution

The correct option is B 635
Detailed step-by-step solution:


In figure A, two out of five columns are shaded. This column’s length is one-fifth of the total length of one unit.
Length of one column = 15 units; length of two columns =25 units

In figure B, three out of seven rows are shaded. This row’s width is one-seventh of the total width of one unit.

Width of one row =17 units; width of three rows =37 units

After overlapping, the total number of sections formed is 35. The number of overlapping sections is 6.

Area of the whole figure = 1 unit×1 unit=1sq. unit

Area of one section = One-thirty fifth of the total area =1 sq unit÷35=135 sq units

Area of the overlapping sections = Area of one section× Total number of overlapping sections

=135×6=635sq units

So, 25×37=635

Hence, option D is correct.

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