Question

A photo frame that measures 12 cm by 18 cm is enlarged to 4 times its area. What will be the new dimensions in cm? A) 24 cm by 36 cm B) 12 cm by 18 cm C) 6 cm by 9 cm D) 48 cm by 72 cm

Answer 1

A

Explanation:

given an enlarged area a then the sides are
`√(a) }`

the area here has been enlarged by 4 times

then sides are enlarged by a factor of
`√(4)` = 2

12 × 2 = 24

18 × 2 = 36

the new dimensions are then 24 cm by 36 cm