The distance (in km) travelled in h hours at a constant speed of 40 km per hour is _________.
The distance (in km) travelled in h hours at a constant speed of 40 km per hour is 40h.
Step 1: Understand the meaning of the speed.
“40 km per hour” means: in 1 hour, the object travels 40 km.
Step 2: Write the formula for distance.
Distance = Speed × Time
Step 3: Substitute the values.
Speed = 40 km per hour
Time = h hours
Step 4: Multiply.
Distance = 40 × h
Step 5: Attach the correct unit.
The unit is kilometres (km), so the distance is 40h km.
Answer: 40h km.