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Question

A field measures 40 hectares. When 8 cumecs of water was supplied for 6 hours, 30 cm of water was stored in the root zone. The field application efficiency is nearly.

A
70%
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B
80%
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C
85%
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D
90%
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Solution

The correct option is A 70%
Total water applied

=8×3600×6

=172800m3

Height of water applied

=Volume of waterArea

=17280040×104=0.432

= 43.2 cm

Field application efficiency

=3043.2×100=70%

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