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36 votes
If A varies direct as a square of R. Find the % increase in A if R is increase by 20%.​

User AStopher
by
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1 Answer

14 votes
14 votes

Answer:

20%

Explanation:

A=R^2

120/100

=1.2

1.2R= new value of R

original of R=R

A^1/2=R

change/origionalx100%

(1.2A^1/2-A^1/2)

-------------------- x 100%

A^1/2

A^1/2 (1.2-1)

--------------- x100%

A^1/2

0.2

---- x100

1

0.2x100

=20%

User Cristian Oliveira
by
2.4k points