BPSC – Combined Competitive Examination · प्रश्न 90
A 140 m long train runs at 60 km/h and a dog runs parallel in the same direction at 18 km/h. The train will pass the dog in:
उत्तर दाखवा आणि स्पष्टीकरण
उत्तर: (B) 12 seconds
स्पष्टीकरण
Same direction: relative speed = 60 − 18 = 42 km/h = 11.67 m/s; time = 140/11.67 = 12 s.
- (A) चूक
Wrong: incorrect.
- (B) बरोबर
Correct: relative speed 42 km/h = 35/3 m/s; 140 ÷ 35/3 = 12 s.
- (C) चूक
Wrong: incorrect.
- (D) चूक
Wrong: incorrect.
- (E) चूक
Wrong: only one of the options A–D is correct.