if in a race of 90 m , a covers the distance in 20 seconds and b in 25 seconds , then a beats b by :
explanation : the difference in the timing of a and b is 5 seconds . hence , a beats b by 5 seconds . the distance covered by b in 5 seconds = ( 90 * 5 ) / 25 = 18 m hence , a beats b by 18 m . answer e
multiply(divide(subtract(25, 20), 25), 90)