Ravi takes 40 seconds whereas Vishnu takes 60 seconds to complete 240 metre race. By how many metres does Ravi defeat Vishnu ?

80 metres

The correct answer is Option (1) → 80 metres

Ravi speed, $V_r=\frac{Distance}{Time}=\frac{240}{40}=6m/s$

Vishnu speed, $U_v=\frac{240}{60}=4m/s$

⇒ Distance covered by Vishnu = $U_v×time$

$=4×40=160m$

∴ Distance Ravi defeats Vishnu by = $240 - 160 = 80 m$