Answer:
9.54%
Step-by-step explanation:
Answer:
Step-by-step explanation:
a is proportional to b²
Let a = kb² (where k is a real number)
=> b = [tex]\sqrt{\frac{a}{k} }[/tex]
If a is increased by 20%, it becomes 120% of a
120% of a = 120a/100
=> b=[tex]\sqrt{\frac{120a}{100k} }[/tex]
=[tex]\frac{\sqrt{120}}{10} \sqrt{\frac{a}{k} }[/tex]
= [tex]\frac{10.954}{10}[/tex]b
= [tex]\frac{109.54}{100}[/tex] b
=109.54% of b
∴, % increase in be = 9.54%