a sailboat travels 35 km in 5 hr & a sailboat is a kind of object ->  a sailbot is a kind of object that travels 35 km in 5 hr  a sailbot is a kind of object that travels 35 km in 5 hr & kilometers km are a metric unit used for measuring length / distance generally used for values between 1 and 50000000 & speed is a measure of distance travelled by an object divided by time & hours hr are a metric unit used for measuring time generally used for values between 025 and 72 ->  the speed of the sailboat can be calculated by dividing 35 by 5  the speed of the sailboat can be calculated by dividing 35 by 5 & dividing 35 by 5 equals to 7 & km/hr is a kind of unit for representing speed -> the speed of the sailboat is 7 km/hr