Question

The area of the four walls of a room is 77m2. The length and breadth of the room are 7.5m and 3.5m respectively. Find the height of the room.​

Answer 1

Answer:

$area \: of \: four \: walls = 2(l + b) \times h \\ \therefore \: 77 = 2(7.5 + 3.5) \times h \\ \therefore \: 77 = 2 \times 11\times h \\ \implies \: h = \frac{77}{2 \times 11} \\ \implies \: h = \frac{7}{2} \\ \implies \: \huge \fbox{ h = 3.5 \: m}$

Thus height of the room is 3.5 metres.

Answer 2

Answer:

Area of the 4 walls =77m2

= 2h (I+b)=77

= 2h (7.5+3.5)=77

= 2h x11=77

h =77 /11x2 = 3.5m

height=3.5m. Ans