500 = 10x + 2 * 15 * 5 + 15x
500 = 25x + 150
500 - 150 = 25x
350 = 25x
x = 14
Triangular ends: 14 * 10 = 140
Base rectangle: 14 * 15 = 210
side rectangles: 5 * 15 * 2 = 150
140 + 210 + 150 =
Answer:
Option B
Coz perimeter is a capital 'P' and apothem length is small 'a'
The conversion formula is f = (9/5) c + 32 [ The 95c is very confusing!]
(9/5)c = f - 32
Multiply both sides by 5/9:-
c = (5/9) ( f - 32)
That's option a).
