Find the length and surface area of a wooden plank of width 3m, thickness 75cm and volume 33.75m3
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Vol. of wooden plank= l×b×h........ ... b= 3m.........., h= 75 cm=0.75m...... So, l×b×h= 33.75.............. l×3×0.75=33.75.......... l = 33.75/3×0.75......=45/3=15....... So length= 15m................ Now TSA of wooden plank = 2(lb+bh+hl)........= 2( 15×3+3×0.75+0.75×15).........=2( 45+2.25+11.25).........= 2( 58.5)...= 117m^2.....
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Volume = lxbxh
33.75=(lx3x75/100)m
33.75/2.25= l
15=l
Therefore, the length of the plnk is 15 m.
T. S. A. =2(lb+bh+hl)
=2x180
=360m2
That's the correct answer.
33.75=(lx3x75/100)m
33.75/2.25= l
15=l
Therefore, the length of the plnk is 15 m.
T. S. A. =2(lb+bh+hl)
=2x180
=360m2
That's the correct answer.
Its wrong
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