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१. थोडक्यात उत्तरे लिहा. (अ) सेनेटरी बाट्यांनी गावातील महिलांना माहिती दिली. (ब) 'भारत माझा देश आहे' या गाण्यातील 'माझा' या शब्दाचा अर्थ स्पष्ट करा.

Mathematics

ScanSolve AI Answer

Answer

45 km/h

Step-by-step solution

2 steps
  1. Speed of the train = length of train / time taken

    v=lengthtimev = \frac{\text{length}}{\text{time}}

    Length = 225 m, time = 18 s

    v=225 m18 s=12.5 m/sv = \frac{225~\text{m}}{18~\text{s}} = 12.5~\text{m/s}
  2. Convert m/s to km/h

    1 m/s=185 km/h1~\text{m/s} = \frac{18}{5}~\text{km/h} v=12.5×185 km/hv = 12.5 \times \frac{18}{5}~\text{km/h}

    First, 12.5÷5=2.512.5 \div 5 = 2.5

    Then, 2.5×18=452.5 \times 18 = 45

    45 km/h

    45 km/h

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