The area of the four walls of a room is 120 m2 and the length is twice the breadth. If the height of the room is 4 m, then the area of the floor is :
A. 48 m2
B. 49 m2
C. 50 m2
D. 52 m2
Answer: Option C
Solution(By Examveda Team)
Let the breadth = x metres and length = (2x) metresArea of 4 walls = [2(2x + x)× 4] m2 = (24x) m2
∴ 24x = 120
⇒ x = 5
So, length = 10 m, and breadth = 5 m
Area of the floor = (10 × 5) m2 = 50 m2
Related Questions on Area
A. 15360 m2
B. 153600 m2
C. 30720 m2
D. 307200 m2
E. None of these
A. 2%
B. 2.02%
C. 4%
D. 4.04%
E. None of these
A. 16 cm
B. 18 cm
C. 24 cm
D. Data inadequate
E. None of these
The percentage increase in the area of a rectangle, if each of its sides is increased by 20% is:
A. 40%
B. 42%
C. 44%
D. 46%
Join The Discussion