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521. A hemispherical bowl of internal diameter 36 cm contains a liquid. This liquid is filled into cylindrical shaped bottles of radius 3 cm and height 6 cm. How many bottles are required to empty the bowl?

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522. A metallic sphere of radius 10.5 cm is melted and then recast into smaller cones, each of radius 3.5cm and height 3 cm. How many cones are obtained?

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523. Find the number of coins 1.5 cm in diameter and 0.2 cm thick to be melted to form a right circular cylinder of height 10 cm and diameter 4.5 cm.

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524. Water in a canal 30 dm wide and 12 dm deep is flowing with a velocity of 20 km/hr. How much area will it irrigate in 30 minutes, if 9 cm of standing water is desired.

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525. Water flows in a tank 150 m x 100 m at the base through a pipe whose cross section is 2 dm by 1.5 dm at the speed of 15 km/hr. In what time will the water be 3 m deep.

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526. Water is flowing at the rate of 3 km/hr through a circular pipe of 20 cm internal diameter into a circular cistern of diameter 10 m and depth 2 m. In how much time will the cistern be filled.

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527. Water flows through a circular pipe of diameter 2 cm at the rate of 6 m/sec into cylinderical tank of radius 60 cm. By how much will the level of the water rise in 30 minutes.

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528. A cylindrical water tank of radius 70 cm and height 2.1 m is being filled by a pipe of diameter 3.5 cm through which water flows at the rate of 2 m/sec. In how much time the tank will be filled?

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529. Water is flowing at the rate of 15 km/hr through a pipe of diameter 14 cm into a rectangular tank which is 50 m long and 44 m wide. Find the time in which the level of water in the tank will rise by 21 cm.

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