Pragya wrapped a cord around a circular pipe of radius 4cm (adjoining figure) and cut off the length required to the cord. Then she wrapped it around a square Box of side 4cm (also shown). Did she have any cord left? (π=3.14
answer with explanation please
answer with explanation please
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Answer:
Pragya wrapped a cord around a circular pipe of radius 4 cm (adjoining figure) and cut off the length required of the cord. ... Yes, she has 9.12 cm cord left.
Verified answer
Answer:
Radius of pipe=4cm
Wrapping cord around circular pipe=2πr
=2×3.14×4=25.12cm
Again, wrapping cord around a square=4×side
=4×4=16cm
Remaining cord=Cord wrapped on pipe−Cord wrapped on square =25.12−16=9.12cm
Thus, she has left 9.12cm cord.