Question

Find the speed of vehicles which cover:
(a) A distance of 600 km in 8 hours.
(b) A distance of 294 km in 7 hours.
(c) A distance of 1368 m in 18 seconds.

• A. 45 km/h, 32 km/h, 80 m/s
• B. 72 km/h, 40 km/h, 70 m/s
• C. 75 km/h, 40 km/h, 73 m/s
• D. 75 km/h, 42 km/h, 76 m/s

Answer 1

The correct option is D

75 km/h, 42 km/h, 76 m/s

$Speed=\frac{Distance}{Timetaken}$
(a) Distance = 600 km, time taken = 8 hours
Speed = $\frac{600}{8}$ = 75 km/h
(b) Distance = 294 km, time taken = 7 hours
Speed = $\frac{294}{7}$ = 42 km/h
(c) Distance = 1368 m, time taken = 18 seconds
Speed = $\frac{1368}{18}$ = 76 m/s