An bus covers a certain distance at aspeed of 210 kmph in 5 hours. To cover the same distance in 1hr, it must travel at a speed of?	Choose the correct answer
A) 560 km/h	B) 567 km/h	C) 779 km/h	D) 723 km/h	E) 630 km/h
Distance = (210 x 5) = 1050 km.   Speed = Distance/Time   Speed = 1050 /(5/3) km/hr. [We can write 1 hours as 5/3 hours]   Required speed = 1050 x 3/5 km/hr = 630 km/hr.   630 km/h
<result>E</result>
An bus covers a certain distance at aspeed of 210 kmph in 5 hours. To cover the same distance in 1hr, it must travel at a speed of?