Question

A red car travels 400 m in 20s. A blue car travels 660m in 30s. Which car has the greater average speed

Answer 1

Answer:

Blue Car

Step-by-step explanation:

Red car:

Speed= Distance / Time = 400/20 m/s = 20 m/s

Blue Car:

Speed = 660/30 m/s = 22 m/s

Answer 2

ANSWER:

• BLUE CAR IS FASTER THAN RED CAR.

GIVEN:

For red car

• Distance traveled = 400m
• Time taken = 20 sec

For blue car

• Distance traveled = 660m
• Time taken = 30 sec

TO FIND:

• Which car has greater speed?

ANSWER:

Formula

$\implies \: average \: speed \: = \frac{total \: distance}{total \: time} \\ \: \: \: \: \: \: \: \: \: \: \: \: \: \\ for \: red \: car \\ \: \implies \: average \: speed \: = \frac{400}{20} \\ \implies \: average \: speed \: = 20ms {}^{ - 1} \\ \: \: \: \: \: \: \: \: \: \: \: \: \: \\ for \: blue \: car \\ \implies \: average \: speed \: \: = \frac{total \: distance}{total \: time} \\ \implies \: average \: speed \: \: = \frac{660}{30} \\ \implies \: average \: speed \: = 22ms {}^{ - 1}$

BLUE CAR IS FASTER THAN RED CAR

NOTE:

some important formulas

$\implies \: average \: velocity = \frac{total \: displacement}{total \: time} \\ \implies \: average \: speed = \frac{total \: distance}{total \: time}$