Pragya wrapped a cord around a circular pipe of radius 7 cm and cut off the length required of the cord. Then she wrapped it around a square box of side 7 cm (as shown). ( use π = 22/7)
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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.
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Answered by
15
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.
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