A bus is moving with a speed of $10ms^{-1}$ on a straight road. A scooterist wishes to overtake the bus in 100s. If the bus is at a distance of 1 from the scooterist, with what speed should the scooterist chase the bus ?

Question

( A ) $20ms^{-1}$
( B ) $40ms^{-1}$
( C ) $10ms^{-1}$
( D ) $25ms^{-1}$