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ABCD is a trapezium in which AB $||$ DC and E, F are points on AD and BC respectively such that EF $||$ DC. If ED = $36$ cm, BF = $70$ cm and FC = $30$ cm, then the length of AD is :
- (a)$124$ cm
- (b)$120$ cm
- (c)$110$ cm
- (d)$114$ cm
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(B) $120$ cm