AFCAT I 2020 Solved Paper

Let Length = 20 and breadth =10 , then permitter = 2(L+w) = 60
Length changed  15% of 20 is 3 ⇒20+3=23 (new length)
Breadth changed  10% of 10 is 1 ⇒ 10-1=9 (new breadth)
Original perimeter =2×30=60 unit
New perimeter =2×32=64 unit
Change in Perimeter is 64-60= 4
% changed =

4

60

×100=6

2

3

%