a ’ s speed is 25 / 18 times that of b. if a and b run a race, what part of the length of the race should a give b as a head start, so that the race ends in a dead heat?
Choose the most appropriate option.
A) 1 / 18 B) 7 / 18 C) 7 / 25 D) 3 / 25 E) 1 / 25
<gadget id="calculator">25 - 18</gadget>
<output>7</output>

<gadget id="calculator">7 / 25</gadget>
<output>7/25 = around 0.28</output>

<result>C</result>
a ’ s speed is 25 / 18 times that of b. if a and b run a race, what part of the length of the race should a give b as a head start, so that the race ends in a dead heat?
divide(subtract(25, 18), 25)
"we have the ratio of a ’ s speed and b ’ s speed . this means , we know how much distance a covers compared with b in the same time . this is what the beginning of the race will look like : ( start ) a _________ b ______________________________ if a covers 25 meters , b covers 18 meters in that time . so if the race is 25 meters long , when a reaches the finish line , b would be 7 meters behind him . if we want the race to end in a dead heat , we want b to be at the finish line too at the same time . this means b should get a head start of 7 meters so that he doesn ’ t need to cover that . in that case , the time required by a ( to cover 25 meters ) would be the same as the time required by b ( to cover 18 meters ) to reach the finish line . so b should get a head start of 7 / 25 th of the race . answer ( c )"