Math, asked by guhanvk18, 10 months ago

15. Water in a canal, 5.4 m wide and 1.8 m deep, is flowing with a speed of 25 km/hour.
How much area can it irrigate in 40 minutes, if 10 cm of standing water is required
for irrigation ?​

Answers

Answered by hishmah
3

Answer:

Step-by-step explanation:

Breadth , b = 5.4 m

Height[depth] , h = 1.8 m

Speed of canal = 25 km/hr

Length of canal in 1 hour = 25 km

Length of canal in 60 minutes = 25 km                         [ 1 hr = 60 min ]

Length of canal in 1 min =  \frac{25}{60}

Length of canal in 40 min =    \frac{25}{60}  × 40

                                         = 16.67 km [ approx . ]

                                         = 16670 m

Volume of canal =  l b h

                          = 16670  × 5.4  × 1.8 m

                         

                          = 162032.4 metres

Height of standing water = 10 cm = 0.1 metres

Volume of water in canal = Volume of area irrigated

Volume of area irrigated = Area irrigated × height

162032.4 metres = Area irrigated × 0.1

Area irrigated =   162032.4 ÷ 0.1

                      =  1620324 m²

1m² = 0.0001 hectares

Area irrigated =  162.0324 hectares

hope it's helpful

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