Answers

2015-10-18T12:42:12+05:30
Here it is said that the cubiod is meltedthat means there volumes are equal.so we neeed to equate them
volume of cubiod=volume of sphere
l*b*h=4/3πr^3
16*12*20=4/3*22/7*r^3
3840=4.1904761904761898*r^3
r^3=3840/4.1904761904761898
r^3=916.3636363636347
r=∛916.3636363636347
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