Question 136

$$45\% of 300 + \sqrt{?} = 56\% of 750 -10\% of 250$$

Solution

Expression : $$45\% of 300 + \sqrt{?} = 56\% of 750 -10\% of 250$$

=> $$(\frac{45}{100} \times 300) + (\sqrt{?}) = (\frac{56}{100} \times 750) - (\frac{10}{100} \times 250)$$

=> $$135 + \sqrt{?} = 420 - 25$$

=> $$\sqrt{?} = 395 - 135 = 260$$

=> $$? = 260^2 = 67600$$

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