dimension of the room are 5×6×7cm find the volume, total surface area,area of the four wall and the diagonal
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Volume of a cuboidal room is l×b×h.
= 5×6×7 cubic cm
= 210 cubic cm.
Total surface area =(lb +bh + hl).
=(5×6 + 6×7 + 7×5) sq cm.
= 30+42+35 sq cm.
= 107 sq cm.
Area of four walls = 2(l+b)h.
= 2×(5+6)×7 sq cm.
= 14×11 sq cm.
= 154 sq cm.
Diagonal of a cuboidal room = √L^2+B^2+H^2 cm.
= √5^2+6^2+7^2cm.
= √25+36+49 cm.
= √110 cm.
= 10√11 cm.
Thanks.
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