In a 200 metres race A beats B by 35 m or 7 seconds. As time over the course is:
40 sec
47 sec
33 sec
None of these
Explanation:
B runs 35 m in 7 sec.
$\therefore$ B covers 200 m in$ \left(\dfrac{7}{35} \times 200\right) $= 40 sec.
Bs time over the course = 40 sec.
$\therefore$ As time over the course $\left(40 - 7\right)$ sec = 33 sec.