Question

A rectangle has an area of 16cm2. If each side has it's length tripled, what is the new area?

Answer 1

Answer:

144 cm^2 is the answer.

Answer 2

Answer:

144cm^2

Step-by-step explanation:

Let x and y be the length and breadth of rectangle respectively. Then,

Ar(Rectangle)=xycm^2=16cm^2

Now each of the sides is tripled. So new length and breadth are 3x and 3y respectively. Then,

Ar(Rectangle)=3x*3y cm^2 = 9xycm^2.

Since xy=16cm^2,

Area of new rectangle=9(16)cm^2=144cm^2

Cheers!