A lawn is in the shape of a right triangle with a perimeter of 215 feet. The lengths of the sides of the triangle are each multiplied by 7. What is the perimeter of the new triangle?

A. 1505 ft.

B. 6100 ft.

C. 7120 ft.

D. 8640 ft.

Perimeter of the new triangle is 1505 ft

Step-by-step explanation:

Step 1: Given the perimeter of the right triangle = 215 ft. Find new perimeter.

Perimeter of the triangle = sum of the sides = a + b + c

Each side is multiplied by 7, so new sides are 7a, 7b, 7c

⇒ New perimeter = 7a + 7b + 7c = 7 (a + b + c) = 7 * 215 = 1505 ft