The table shows the time four elevators take to travel various distances. Find which elevator is fastest and which is slowest.
Distance(m) Time(sec)
Elevator - A 435 29
Elevator - B 448 28
Elevator - C 130 10
Elevator - D 85 5
How much distance will be travelled by elevators B and C separately in 140 sec? Who travelled more and by how much?

Solution:

The speed of the various elevators are:

Elevator - A = 435/29 = 15 m/s

Elevator - B = 448/28 = 16 m/s

Elevator - C = 130/10 = 13 m/s

Elevator - D = 85/5 = 17 m/s

The elevator which is the fastest is Elevator - D with speed of 17 m/s

The elevator which is the slowest is Elevator - C with speed 13 m/s

Distance travelled by Elevator - B in 140 seconds = 16 × 140 = 2240 metres

Distance travelled by Elevator - C in 140 seconds = 13 × 140 = 1820 metres

✦ Try This: The table shows the time four elevators take to travel various distances. Find which elevator is fastest and which is slowest.

	Distance(m)	Time(sec)
Elevator - A	544	32
Elevator - B	480	30
Elevator - C	196	14
Elevator - D	132	11

How much distance will be travelled by elevators B and C separately in 120 sec? Who travelled more and by how much?

The speed of the various elevators are:

Elevator - A = 544/32 = 17 m/s

Elevator - B = 480/30 = 16 m/s

Elevator - C = 196/14 = 14 m/s

Elevator - D = 132/12 = 11 m/s

The elevator which is the fastest is Elevator - A with speed of 17 m/s

The elevator which is the slowest is Elevator - D with speed 13 m/s

Distance travelled by Elevator - B in 140 seconds = 16 × 120 = 1920 metres

Distance travelled by Elevator - C in 140 seconds = 14 × 120 = 1680 metres

☛ Also Check: NCERT Solutions for Class 8 Maths Chapter 13

NCERT Exemplar Class 8 Maths Chapter 10 Problem 95

The table shows the time four elevators take to travel various distances. Find which elevator is fastest and which is slowest. Distance Time Elevator - A 435 29 Elevator - B 448 28 Elevator - C 130 10 Elevator - D 85 5. How much distance will be travelled by elevators B and C separately in 140 sec? Who travelled more and by how much

Summary:

The table shows the time four elevators take to travel various distances. The elevator which is the fastest is Elevator - D and Elevator - C is the slowest. B will travel 2240 m in 140 seconds and Elevator C will travel 1820 metres in 140 seconds

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