Compute the total consumptive use for a drainage basin by Penman s formula. The slope of saturation vapour pressure V/s chart at 40 C is 2.95 mm of Hg/ C and the net incoming solar radiation is 5.705 mm of evaporative water/day. Assume, Ea = 18.07 mm/day and Psychrometric constant = 0.49 mm of Hg/ C.

Compute the total consumptive use for a drainage basin by Penman s for

1.	Compute the total consumptive use for a drainage basin by Penman s formula. The slope of saturation vapour pressure V/s chart at 40 C is 2.95 mm of H_g/ C and the net incoming solar radiation is 5.705 mm of evaporative water/day. Assume, E_a = 18.07 mm/day and Psychrometric constant = 0.49 mm of H_g/ C.
A.	17.01 mm/day
B.	18 mm/day
C.	11.07 mm/day
D.	20.45 mm/day
Answer» B. 18 mm/day