What approximate value should come in the place of question mark (?) in the following question?$1325\sqrt {17} + 508.24\ of\ 20\% - 85.39\…

In this type of question, we are expected to calculate Approximate value (not exact value), so we can replace the given numbers by their nearest perfect places which makes the calculation easy.

√ 17 ≈ 4, 508.24 ≈ 508, 85.39 ≈ 85

⇒ 1325 × 4 + 508 × 0.2 – 85 × 0.75

⇒ 5300 + 101.6 – 63.75

⇒ 5337.85 = ?

? We have considered √ 17 as 4 the value of ? is closer to 5200 but it can’t be the answer, the approximate value should be greater than the value which we get.

∴ The value of ? is 5500.