how many planks each of which is 2m long, 2.5cm broad, 4cm thick can be cut off from a wooden block of 6m long, 15 cm broad, 40 cm thick
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l=200cm
b=2.5cm
h=4cm
Volume of Planks =l×b×h
=2×10×10×2.5×4
=20×25×4 cu.Cm
=2000 cu.Cm
Now,volume of wooden block= 6×10×10×15×40
=360000 cu.Cm
If plank is cut off from wooden block=360000-2000
=358000 cu.Cm
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