Instructions

What approximate value will come in place of question mark (?) in the given questions? (You are not expected to calculate the exact value)

Question 76

$$24.98^{2}\times\frac{16.02^{2}}{(7.98\times15.04)}\times38.93=130\times?^{2}$$

Solution

Expression : $$24.98^{2}\times\frac{16.02^{2}}{(7.98\times15.04)}\times38.93=130\times?^{2}$$

=> $$25^2 \times \frac{16^2}{8 \times 16} \times 39 = 130 \times x^2$$

=> $$625 \times 2 \times 39 = 130 \times x^2$$

=> $$x^2 = 125 \times 3 = 375$$

=> $$x = \sqrt{375} = 19.5 \approx 20$$

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