When pumping water out of a full hemispherical basin with radius r feet, how far down will the water level be when 1/4 of the work has been done? [The density of water is 62.4 lbs/ft3.]
A) ![When pumping water out of a full hemispherical basin with radius r feet, how far down will the water level be when 1/4 of the work has been done? [The density of water is 62.4 lbs/ft<sup>3</sup>.] A) B) C) D)](https://d2lvgg3v3hfg70.cloudfront.net/TB5869/11eaa88b_9199_d5ef_a696_5922a0b98813_TB5869_11.jpg)
B) ![When pumping water out of a full hemispherical basin with radius r feet, how far down will the water level be when 1/4 of the work has been done? [The density of water is 62.4 lbs/ft<sup>3</sup>.] A) B) C) D)](https://d2lvgg3v3hfg70.cloudfront.net/TB5869/11eaa88b_9199_fd00_a696_bf33ae795efb_TB5869_11.jpg)
C) ![When pumping water out of a full hemispherical basin with radius r feet, how far down will the water level be when 1/4 of the work has been done? [The density of water is 62.4 lbs/ft<sup>3</sup>.] A) B) C) D)](https://d2lvgg3v3hfg70.cloudfront.net/TB5869/11eaa88b_9199_fd01_a696_9fec50b5fdbd_TB5869_11.jpg)
D) ![When pumping water out of a full hemispherical basin with radius r feet, how far down will the water level be when 1/4 of the work has been done? [The density of water is 62.4 lbs/ft<sup>3</sup>.] A) B) C) D)](https://d2lvgg3v3hfg70.cloudfront.net/TB5869/11eaa88b_919a_2412_a696_73520bc80faf_TB5869_11.jpg)
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