Question

plsss answer this 3 question with full methids grade 9

Answer 1

Hii dear!!

Question 1.
Volume of water in the canal = l*b*h
30*12*10000 = 36,00,000 cubic meter
36,00,000 cubic meter flows in 1 h

Area of plot = l*b
volume = l*b*h = 36,00,000
l*b*0.16 = 36,00,000
l*b = 36,00,000/ 0.16
l*b = 2,25,000 sq m
Therefore an area of 2,25,000 sq/m will be irrigated.
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Question 2.

speed of meter = 3km/h = 3000m/hr
let the time be x hour.
length of water column = 3000* m
water flow in one minutes = 3000/60= 50m/min
volume of water flow into the sea = l*b*h
= 50* 2.5* 30
= 3750 m^3
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Question 3

Let the increase in height = h
Volume of cube = volume of water risen
9^3 = 15* 12* hh = 9^3/(15*12)
h = 4.05cm rise in water level.