Rain water, which falls on a flat rectangular surface of length 6 m an

1.	Rain water, which falls on a flat rectangular surface of length 6 m and breadth 4 m is transferred into a cylindrical vessel of internal radius 20 cm. What will be the height of water in the cylindrical vessel if a rainfall of 1 cm has fallen?[ use π = 22/7]
Answer» Volume of rainfall = lbh = 6 × 4 × 0.01 = 0.24 m³ ∵ Volume of water in cylindrical vessel = volume of rainfall ∴ πr²h = 0.24 ⇒ h = \(\frac{0.24\times7}{22\times0.2^2}\) ⇒ h ≈ 1.91m = 191 cm

Rain water, which falls on a flat rectangular surface of length 6 m and breadth 4 m is transferred into a cylindrical vessel of internal radius 20 cm. What will be the height of water in the cylindrical vessel if a rainfall of 1 cm has fallen?[ use π = 22/7]

Answer»

Volume of rainfall = lbh

= 6 × 4 × 0.01

= 0.24 m³

∵ Volume of water in cylindrical vessel = volume of rainfall

∴ πr²h = 0.24

⇒ h = \(\frac{0.24\times7}{22\times0.2^2}\)

⇒ h ≈ 1.91m = 191 cm