Jethalal and Tarak Mehta have two spools of 'Dhaga' (a specially prepared thread) to fly their kites. Each of the Dhagas has tiny knots at regular intervals, which helps in keeping track of the length of the Dhaga that is used. Each of the persons has the same length of Dhaga. While Jethalal'sDhaga has knots at intervals of 10 feet, Tarak Mehta's Dhaga has knots at intervals of 12 feet. Also, Tarak Mehta's Dhaga has exactly 10 knots less than that of Jethalal. If each of the Dhagas starts and ends with a knot, find the length (in feet) of the Dhaga with either of them.

Jethalal and Tarak Mehta have two spools of 'Dhaga' (a specially prepa

1.	Jethalal and Tarak Mehta have two spools of 'Dhaga' (a specially prepared thread) to fly their kites. Each of the Dhagas has tiny knots at regular intervals, which helps in keeping track of the length of the Dhaga that is used. Each of the persons has the same length of Dhaga. While Jethalal'sDhaga has knots at intervals of 10 feet, Tarak Mehta's Dhaga has knots at intervals of 12 feet. Also, Tarak Mehta's Dhaga has exactly 10 knots less than that of Jethalal. If each of the Dhagas starts and ends with a knot, find the length (in feet) of the Dhaga with either of them.
A.	500
B.	600
C.	520
D.	150
E.	450
Answer» C. 520

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