CTET Paper I (Classes I to V) Sep 2015 Solved Paper

Concept:To compare areas, units must be the same. Convert all measurements to the same unit before calculating.Explanation:Check each option:A: $25$ hundredths = $\frac{25}{100}$ is correct.B: $0.57 = 0.5700$ because trailing zeros after a decimal do not change the value.C: Side of square = $30$ cm. Area = $30 \times 30 = 900$ cm².Rectangle: $4.5$ m × $0.2$ m = $0.9$ m².Convert $0.9$ m² to cm²: $1$ m² = $10000$ cm², so $0.9 \times 10000 = 9000$ cm².Areas: $900$ cm² ≠ $9000$ cm². So this statement is false.D: $2009$ mL = $2$ L $9$ mL because $1$ L = $1000$ mL, so $2000$ mL = $2$ L, leaving $9$ mL.Thus, the incorrect statement is C.Answer:Option C is not correct.