A can give B a start of 50 metres or 10 seconds in a kilometer race. How long does A take to complete the race?	Choose the correct choice from the following answers.
A) 200 seconds
B) 140 seconds
C) 220 seconds
D) 190 seconds
E) none

Rationale: solution : a can give b a start of 50 metres or 10 seconds in a 1000 m race . that is , b takes 10 seconds to run 50 metres . therefore , b will take ( 10 / 50 ) * 1000 = 200 seconds to run 1000 metres . a who can give b a start of 10 seconds will take 10 seconds lesser to run the 1000 m . hence , the time taken by a = 190 seconds . answer d
Answer: D