Application of integration

[misty dawn]

Can anyone help me with this question? I can't get the exact answer. The answer given is 617 400.

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[marble dove]

x=y/7
dv=(2y/7)²dy
dm=1000•(2y/7)²•dy
dE=1000•(2y/7)²•9.8•(12-y)•dy

@misty dawn

which you integrate from 0 to 7 to get total energy

[misty dawn]

@marble dove thank you so much

[balmy prism]

@misty dawn has given 1 rep to @marble dove

[misty dawn]

+close