in a 200 m race , a covers the distance in 45 seconds and b in 60 second . in this race a beats b by :
"solution distance covered by b in 15 sec . = ( 200 / 60 x 15 ) m = 50 m . ∴ a beats b by 50 metres . answer b"
multiply(divide(200, 60), subtract(60, 45))