In one fortnight of a given month there was a rainfall of 10 cm in a river valley. lf the area of the valley is 7280 km *2 show that the total rainfall was approximately equivalent to the addition to the normal water of three rivers each 1072 km long, 75 m wide and 3 m Deep.
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Area of the valley, A = 97280 km2
Level in the rise of water in the valley, h = 10 cm = (10/100000) km = (1/10000) km
Thus, amount of rain fall in 14 day = Ah = 97280 km2 × (1/10000) km = 9.828 km3
Amount of rain fall in 1 day = 9.828 /14 = 0.702km3
Volume of water in 3 rivers = length × breadth × height = 1072 km × 75 m × 3 m = 1072 km × (75/1000) km × (3/1000) km = 0.2412 km3 x3 = 0.7236 km3
This shows that the amount of rain fall is approximately equal to the amount of water in three rivers.
Level in the rise of water in the valley, h = 10 cm = (10/100000) km = (1/10000) km
Thus, amount of rain fall in 14 day = Ah = 97280 km2 × (1/10000) km = 9.828 km3
Amount of rain fall in 1 day = 9.828 /14 = 0.702km3
Volume of water in 3 rivers = length × breadth × height = 1072 km × 75 m × 3 m = 1072 km × (75/1000) km × (3/1000) km = 0.2412 km3 x3 = 0.7236 km3
This shows that the amount of rain fall is approximately equal to the amount of water in three rivers.
abhijithdethp63g10:
i have did this question last month i think area of vally is 97280
is it correct
r u a class 10 student
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Congratulations for 15k points dii love u
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