1.

There are six circular rings of iron , kept close to each other . A string binds them as tightly as possible.If the radius of each circulariron ring is 1 cm. What is the minimum possible length of string required to bindthem ?

Answer»

`2(6 + 3 SQRT(3) + PI ) cm `
`6 ( 2+ sqrt(3))pi cm `
`2(6 + pi) cm `
none of the above

Answer :C


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