Mathematics
A rectangular room is 6 m long, 4.8 m wide and 3.5 m high. Find the inner surface area of the four walls.
Answer
It is given that
Length of rectangular room = 6 m
Breadth of rectangular room = 4.8 m
Height of rectangular room = 3.5 m
By formula,
Inner surface area of four walls = 2(l + b) × h
= 2(6 + 4.8) × 3.5
= 2 × 10.8 × 3.5
= 21.6 × 3.5
= 75.6 m2.
Hence, inner surface area of four walls = 75.6 m2.
Related Questions
Find the perimeter and area of the figure (i) given below in which all corners are right angles.
A rectangular garden 10 m by 16 m is to be surrounded by a concrete walk of uniform width. Given that the area of the walk is 120 square metres, assuming the width of the walk to be x, form an equation in x and solve it to find the value of x.
A rectangular plot of land measures 41 metres in length and 22.5 metres in width. A boundary wall 2 metres high is built all around the plot at a distance of 1.5 m from the plot. Find the inner surface area of the boundary wall.