It is planned to construct a four-bar mechanism ABCD with length AB= 60mm, BC = 100mm, CD = 70 mm and fixed link AD = 200 mm. If at least one link is required to have a complete rotation, this mechanism is

It is planned to construct a four-bar mechanism ABCD with length AB= 6

1.	It is planned to construct a four-bar mechanism ABCD with length AB= 60mm, BC = 100mm, CD = 70 mm and fixed link AD = 200 mm. If at least one link is required to have a complete rotation, this mechanism is
A.	of crank-rocker type
B.	of double-crank type
C.	of double rocker type
D.	impossible to construct
Answer» D. impossible to construct

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