49.686 kg
Step-by-step explanation:
Since the density of the air remains constant in the question
We can represent this equation as a ratio;
10 m³ = 13 kg
(4.2 * 3.5 * 2.6) m³ = ? (x) kg
4.2 * 3.5 * 2.6 = 38.22
We cross multiply
38.22 * 13 = 10 * x
X = 496.86 /10
X = 49.686
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Answer:
B
x% of 6 = 5.25
x 6 = 5.25
= x
x = 87.5 %
discount = 100 - 87.5 %
= 12.5 %