Question

M-20
ICSE Mathematics for Class 9
8. A K-shaped shed with a flat roof is made on a rectangular plot of land measuring 18 m by 9 m.
Find the area of the roof.
А 3 m в
E
6 m
3 m
F
G
3 m
O
13 m
HI
N
6 m
3 m
D 3 m C
M
ia
Ann.​

Answer 1

Answer:

A3mB

Step-by-step explanation:

Because hear is written to find the area only one is written in area.

Answer 2

Answer:90m²

Step-by-step explanation:

AE=DM=9m

AD=EM=18m

Area of rectangle=L×B=18×9=162m²

Area of triangle BGE=½b×h=6×6/2=18m²

Area of triangle BGE= Area of triangle CHM

Area of triangle FNO=½bh=6×12/2=36m²

Area of roof=Area of rectangle-(Area of triangleBGE+Area of triangleCHM+Area of triangle FNO)

Area of roof= 162-(18+18+36)m²

=162-72=90m²(ans)