a) 70 km
b) 560 km
c) 640 km
d) 650 km
Answer: c
Explanation: Relative speed of the trains = 40 + 30 = 70 kmph.
Time taken by trains to collide,
= $$\frac{{560}}{{70}}$$
= 8 hours
In 8 hours sparrow will cover,
= 8 × 80
= 640 km.
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