A runs 25% faster than B and is able to allow B a lead of 7 meters to end a race in dead heat. What is the length of the race?  Select:
A) 10 meters B) 25 meters C) 45 meters D) 15 meters E) 35 meters
Answer   A runs 25% as fast as B.   i.e., if B runs 100 m in a given time, A will run 125 m in the same time.   In other words, if A runs 5 m in a given time, then B will run 4 m in the same time.   Therefore, if the length of a race is 5 m, then A can give B a start of 1 m (A can allow B to start 1 ahead of the starting point) so that they finish the race in a dead heat.   Ratio of length of start given : length of race :: 1 : 5   In this question, we know that the start given is 7 m.   Hence, the length of the race will be   7 * 5= 
<gadget id="calculator">  7 * 5</gadget>
<output>35</output>
35 m.   Choice 35 meters
<result>E</result>
A runs 25% faster than B and is able to allow B a lead of 7 meters to end a race in dead heat. What is the length of the race?