AP EAMCET Engineering 2018 Apr 23 Shift 1 Paper

Tyre of a bicycle has volume 2 × 10−3m3 . Initially the tube is filled 75% of its volume by air at atmospheric pressure 105Nm−2 . When a rider is on the bicycle, the area of contact of tyre with road is 24 × 10−4m2 . The mass of rider with bicycle is 120 kg. If a pump delivers a volume 500 cm3 of air in each stroke then the number of strokes required to inflate the tyre is
(g = 10 ms−2)