Question

12. If the perimeter of
a room is 18m and its lateral surface
area is 63m^2, then find the height of the room.
​

Answer 1

Step-by-step explanation:

• Perimeter=4L = 18 /4 = L, 4.5= L
• P= 2(L+B), P= 2L+2B, p= 2×4.5+2B, p= 9+2B, 18-9= 2B, 9= 2B, 9/2=B and B= 4.5
• 63=4.5×h, 63/4.5=h 14=h

Answer 2

Perimeter=4L = 18 /4 = L, 4.5= L

P=2(L+B),

P= 2L+2B,

p= 2x4.5+2B,

p= 9+2B,

18-9= 2B,

9= 2B, 9/2-B and B= 4.5

63-4.5xh,

63/4.5

height = 14