The answer is 460 because if you round 450 to the nearest 10 it equals 460
11.5 because all you do is divide the numbers by 2
Here it is given that the triangles ABP and DCR are similars, therefore we use the ratio rule which states that
corresponding sides of similar triangles are in same proprtion .

that gives
7/10 = BP/11
7*11=10BP
BP=7.7
Again using the ratio rule

7/10 = AP/6
42 = 10AP
AP = 4.2
Perimeter= AB+BP+AP = 7+7.7+4.2 = 18.9
Correct option is A.
(25×4)6×5=130 and 8 need 20 characters so I need to type this