alleryएक कमरा 10 m लंबा, 8 m चौड़ा और 3 m ऊँचा है। इसकी चारों दीवारों का कुल क्षेत्रफल क्या है?
A240 m²
B108 m²
C216 m²
D144 m²
Answer & Solution
Correct answer: B. 108 m²
चारों दीवारों का क्षेत्रफल 2(l + b)h = 2 x 18 x 3 = 108 वर्ग मीटर है।
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