a cluster of clouds burst at a height of 1000th above earth
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Explanation: Here, h=1000m,A=106m2,
d = 2cm=2×10−2m
ρ = 103kg/m3,g=10m/s2
Mass of water =(A×h)ρ
= 106×2×10−2×103
= 2×107kg
Work done = force × distance
= wt. of water × height = mgh
= 2×107×10×1000
= 2×1011J
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