PLEASE HELP
THANK YOU!!
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Step-by-step explanation:
First find the area of the wall, then find the area of the blackboard and subtract the area of blackboard from that of wall.
Area of wall = l×b
= 14×10
= 140 m²
Area of blackboard = l×b
= 3×1.2
= 3.6 m²
Area which is without the blackboard = area of wall - area of blackboard = 140m²- 3.6m²
= 136.4m²
Hope it helps!
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