Question

A ship sailed 30 kilometers in 1 1/2 hours. What is was its rate in kilometers per hour?

Answer 1

Answer:

20km/hr

Step-by-step explanation:

Given that a ship sailed 30km in one and a half hours. We need to find out the rate of ship in kilometres/hour . The rate is also called Speed.

Speed:- Distance travelled per unit time is called Speed .

Here , according to Question,

Distance = 30 km

Time = 1½ hrs .

We know that ,

$\rm\implies Distance = Speed \times Time$

Subsequently ,

$\rm\implies Time = \dfrac{Distance}{Time}$

Substitute the respective values ,

$\rm\implies Rate =\dfrac{ 30km}{ 1.5 hrs }$

We can write 1.5 as 3/2 , therefore ,

$\rm\implies Rate = \dfrac{ 2\times 30}{3} km/hr$

Simplify the RHS ,

$\rm\implies\boxed{\blue{\rm Rate = 20\ km/hr}}$

Hence the Rate/Speed of the ship is 20km/hr .