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Answer 1

Answer:

$Solution:-</p><p>\textsf{Let the common ratio be x}Let the common ratio be x</p><p></p><p>\textsf{Now, Age of Ram= 3x < /p > < p > Age of Shyam= 4x}Now, Age of Ram= 3x < /p > < p > Age of Shyam= 4x</p><p></p><p>\textsf{Ages after five years,}Ages after five years,</p><p></p><p>\textsf{Age of Ram after years= (3x+5)years}Age of Ram after years= (3x+5)years</p><p></p><p>\textsf{Age of Shyam after five years= (4x+5)years}Age of Shyam after five years= (4x+5)years</p><p></p><p>\textsf{Now, sum of ages of ram and Shyam after five years= 45}Now, sum of ages of ram and Shyam after five years= 45</p><p></p><p>\bold{ \implies (3x + 5) + (4x + 5) = 45}⟹(3x+5)+(4x+5)=45</p><p></p><p>\bold{ \implies7x + 10 = 45}⟹7x+10=45</p><p></p><p>\bold{ \implies7x = 45 - 10}⟹7x=45−10</p><p></p><p>\bold{ \implies7x = 35}⟹7x=35</p><p></p><p>\bold{ \implies \: x = \frac{35}{7}}⟹x= </p><p>7</p><p>35</p><p> </p><p> </p><p></p><p>\huge\purple\star\red{\boxed{ \underline{ \mathfrak{ \implies \: x = 5}}}}⋆ </p><p>⟹x=5</p><p> </p><p> </p><p> </p><p> </p><p></p><p>\textsf{Present age of ram =3x= 3(5)= 15 years}Present age of ram =3x= 3(5)= 15 years</p><p></p><p>\textsf{Present age of Shyam= 4x= 4(5)= 20 years}Present age of Shyam= 4x= 4(5)= 20 years$

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Answer 2

Respiration in fish takes place with the help of gills. Most fish possess gills on either side of their head. Fish take in oxygen-rich water via their mouths and pump it over their gills. When water moves over the gill filaments, the blood within the capillary network takes up the dissolved oxygen.

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