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  • Water in a canal, 6m wide and 1.5m deep, is flowing with a speed of 10 km/hour. How much area will it irrigate in 30 minutes; if 8cm standing water is needed?    

Water in a canal, 6m wide and 1.5m deep, is flowing with a speed of 10 km/hour. How much area will it irrigate in 30 minutes; if 8cm standing water is needed?

 

 

Answers (1)

Width of canal = 6m

Depth of canal = 1.5m

Speed of canal = 10km/h

length of canal in 60 minutes = 10km.

So,length of canal in 30 minutes = 5km or 5000m.

Volume of canal = Volume of cuboid = l.b.h

=5000\times 6\times 1.5\: \: m^3

Now,

Volume of water in canal = Volume of area irrigated

Area irrigated x 8cm  =5000\times 6\times 1.5\: \: m^3

Area \: \: irrigated\times \frac{8}{100}m=5000\times 6\times 1.5\: \: m^3

Total area irrigated = 562500m^2

Approximately,

10000m^2 = 1 hectares

1m^2 = 1/10000 hectares

Area irrigated(in hectares) = \frac{562500}{10000} = 56.25 Hectares.

                 

Posted by

Safeer PP

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