"If the wheel of the engine of a train `4 2/7`metres in circumference makes 7 revolutions
Channel: Doubtnut
Date: 2020-04-05

"If the
 wheel of the engine of a train `4 2/7`
metres in
 circumference makes 7 revolutions in 4 seconds, then the speed (in km/hr) of
 the train is
(a) 27 (b) 28 (c) 29 (d) 30"