A logo wood of dimensions 2m *20cm*10cm is cut into small blocks of 10cm*5Cm*4cm.How many blocks do we get? What will be the total surface area of all these blocks?
Answers
this is answer I think so
Answer: no. of blocks = 200
total surface area of all blocks =44000 cm sq.
Step-by-step explanation:
dimensions of wooden log= 2m * 20cm * 10cm
firstly converting into same units
hence, dimensions of wooden log= 200cm * 20cm * 10cm
Volume of wooden log = 40000 cu cm
Volume of Wooden block = 10cm×5cm×4cm
= 200 cu cm
No. of blocks = 40000/200
= 200
Total surface area of 1 block = 2(lb+bh+hl)
=2 (10×5 + 5×4 + 4×10)
=2(50+20+40)
=2×110
=220 cm sq.
Total surface area of all blocks = T.S.A of 1 block × No. of blocks
= 220 × 200
=44000 cm sq.