A rectangular board has a length of 15cm and width x cm. If its sides are doubled, find its new area.
A
60x cm\(^2\)
B
45x cm\(^2\)
C
30x cm\(^2\)
D
15x cm\(^2\)
Verified Correct Answer: A.
Step-by-Step Mathematical Solution
New are = (2 x 15) x (2 x \(x\))
= 60cm\(^2\)
Source: Myschool Past Questions Archive (Record #57274)