in one fortnight of a given month ,there was a rainfall of 10cm in a river valley .if the area of the valley is 97280 km sq. ,show that the total rainfall was approx. equivalent to the addition to the normal water of the three rivers each ,1072 km long ,75m wide and 3m deep.

PLEASE HELP THIS ANSWER IS NOT AVAILABLE ON MERITNATION NCERT SOLUTION.

here is d soln bro

Area of the valley,

*A*= 97280 km^{2}Level in the rise of water in the valley,

*h*= 10 cm = (10/100000) km = (1/10000) kmThus, amount of rain fall =

*Ah*= 97280 km^{2}× (1/10000) km = 9.828 km^{3}in 14 days 9.828km3 in 1 day 0.702km3

Volume of water in each river = length × breadth × height = 1072 km × 75 m × 3 m = 1072 km × (75/1000) km × (3/1000) km = 0.2412 km

^{3}Thus, the volume of water in three rivers = 3 × 0.2412 km

^{3}= 0.7236 km^{3}and amt of rainfall= 0.702 km3 which is approximately equal

This shows that the amount of rain fall is approximately equal to the amount of water in three rivers.

cheers!!!!

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