Mathematics
Grade-8
Easy

Question

The speed of two different cars is shown below:

The true statement among the following is

  1. Model A’s speed is greater than model B
  2. Model B’s speed is greater than model A
  3. Both have equal speeds
  4. Model A’s speed is twice that of model B’s

The correct answer is: Model B’s speed is greater than model A


    F o r space M o d e l space A comma
D i s tan c e space t r a v e l l e d space b y space t h e space c a r space equals space d subscript 1 space equals space 10 space k m
T i m e space t a k e n space b y space t h e space c a r space equals space t subscript 1 space equals space 5 space h r

S p e e d space o f space t h e space c a r space equals space s subscript 1 space equals space d subscript 1 over t subscript 1 space equals space 10 over 5 space equals space 2 space k m divided by h r

F o r space M o d e l space B comma
D i s tan c e space t r a v e l l e d space b y space t h e space c a r space equals space d subscript 2 equals space 4 space k m
T i m e space t a k e n space b y space t h e space c a r space equals space t subscript 2 space equals space 1 space h r

S p e e d space o f space t h e space c a r space equals space s subscript 2 space equals space d subscript 2 over t subscript 2 space equals space 4 over 1 space equals space 4 space k m divided by h r

H e n c e comma space s subscript 2 space equals space 2 s subscript 1
M o d e l space A apostrophe s space s p e e d space i s space t w i c e space t h a t space o f space M o d e l space B apostrophe s

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