http://www.jetairtravel.com/scale-air/
alloy is placed on a scale in the air, it weights 28.5 pounds. when submerged in fresh water its is 24.3 pound
a. 4.8 c. 6.8
b. 5.8 d. 7.8
# You are asking about specific gravity of an alloy.
# It is :
c. 6.8
#The specific gravity of the solid is the ratio of its weight in air to the difference between its weight in air and its weight immersed in water.
The specific gravity of the solid
=28.5/[28.5-24.3]
=28.5/4.2
=6.7619
=6.8 [upto 1 decimal]
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