Chase: a faster runner catches a slower one who has a head start in time or distance

1. A.
   200 m
2. B.
   300 m
3. C.
   400 m
4. D.
   500 m

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1. A.
   55 km from the owner's house and one hour after the theft
2. B.
   60 km from the owner's house and 1.5 hours after the theft
3. C.
   60 km from the owner's house and 1.5 hours after the discovery of the theft
4. D.
   55 km from the owner's house and 1.5 hours after the theft

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1. A.
   $\dfrac{ud}{(u - v)}$
2. B.
   $\dfrac{vd}{(u - v)}$
3. C.
   $\dfrac{(ud - vd)}{(u - v)}$
4. D.
   $\dfrac{(ud + vd)}{(u + v)}$

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1. A.
   $\frac{200}{3}$ km
2. B.
   100 km
3. C.
   $\frac{400}{3}$ km
4. D.
   $\frac{1000}{3}$ km

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1. A.
   3 km
2. B.
   3.5 km
3. C.
   4 km
4. D.
   4.5 km

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