Question

the other two sides.
38. Water in a canal 6 m wide and 1.5 deep, is flowing with a speed of 10 km/h. How much area will be irrigate in 30minutes, If 8 cm of standing water is needed ?​

Answer 1

Answer:

562500 m²

Step-by-step explanation:

Surface area of the opening of the canal:

Area = 6 m x 1.5 m = 9 m²

Speed of the water that will flow out in 30 mins in metres:

1 hour = 10 km

30 mins = 10  ÷ 2  = 5 km = 5000 m

Find the amount of water that are flowed out in 30 mins:

Total water flowed = area x speed

Total water flowed = 9 x 5000 = 45 000 m³

Find the area of the water after 30 mins:

height = 8 cm = 0.08 m

Area = 45 000 ÷ 0.08 = 562500 m²