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Question

A canal was designed to supply the irrigation needs of 1000 ha of land growing rice of 140 days base period and having a delta of 130 cm. If the canal water is used to irrigate wheat of base period 119 days and having a delta of 50 cm, the area that can be irrigated is

A
452 ha
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B
904 ha
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C
1105 ha
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D
2210 ha
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Solution

The correct option is D 2210 ha
The discharge (Q) in the canal remains the same.

Duty for rice,D1=1000Qha/cumec

Duty for wheat,D2=A2Qha/cumec

Now D1Δ1B1=D2Δ2B2

A2=119140×13050×10002

= 2210 ha

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