Question

A scientist builds a Mars rover that can travel 4.9 centimeters per second on flat ground.

If the rover continues at the same rate, how many centimeters will it travel in 15 1/2 seconds?
Enter your answer in the box.

Answer 1

75.95cm

Explanation:

4.9 multiplied by 15 will represent the 15 seconds

4.9 • 15 = 73.5

4.9 divided by 2 will equal the 1/2 seconds

4.9 ÷ 2 = 2.45

add them all together

73.5 + 2.45 = 75.95 cm

Answer 2

Explanation:

distance = time * speed

4.9 = 1 second* speed

speed = 4.9/1 = 4.9 cm/sec

time = 15 1/2 = 31/2

distance = 31/2 * 4.9 = 75.95 cm