A gives a start of 150m to B and finished a race of 1 km in dead heat. Find the ratio of their speed.

20 : 17

                         A                              B

Distance           1000m                      850

              ⇒          20           :             17

When time is same, then speed is directly proportional to distance.

Therefore,

 Ratio of speed ⇒ 20            :             17