Question

The area of four walls of room is 168 m square the breadth and height of room are 10 m. And 4 m. Respectively find the length of the room using formula

Answer 1

Let dimensions of the room are
Length =l m
Breadth= 10m
Height= h =4 m
Given
Area of four walls of the room =168m
2(l+b)h=168
2(l+10)*4=168
l+10=168/(2×4)
l+10=21
l=21-10
l=11 m
Therefore
Leangh =l=11m

Answer 2

here is your answer

hope its help you