Question

The lengths of the sides of a rectangle become 3 times greater than the original measurements. Which statement is true about the rectangle?

Its area becomes 3 times greater, and perimeter becomes 9 times greater.

Its area becomes 6 times greater, and perimeter becomes 3 times greater.

Its area becomes 3 times greater, and perimeter becomes 6 times greater.

Its area becomes 9 times greater, and perimeter becomes 3 times greater.

Answer 1

area of rectangle= length * bredth
here area= 3. length * 3. bredth
so area= 9. length*bredth
pritmeter = 2( length + bredth) => 2 ( 3.length* 3.bredth) = 3*2(lenght *bredth)
s perimeter is thrice and area is 9 times