A maple leaf is caught between a car's windshield and the windshield wiper. The windshield wiper is 50 cm in length and sweeps through an angle of 143°. The leaf traces a 109 cm long arc across the windshield as shown below. 250- 143⁰ 109 cm 50 cm The distance from the leaf to the end of the windshield wiper, a in the diagram above, to the nearest tenth of a centimetre, is cm

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