The required distance after time t is given as 1.5t.
Given that,
Speed in the race is given as 1.5 meters per second, to determine distance, d, is covered after, t, seconds.
Distance is defined as the object traveling at a particular speed in time from one point to another.
Speed is defined as when an object is subjected to movement, the distance covered by the object in a certain time interval is the speed of that object.
Here,
Speed = 1.5 m/s
Distance = speed × time
Distance = 1.5 × t
Distance(d) = 1.5t
Thus, the required distance after time t is given as 1.5t.
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A. 14/28
B. 14/17
C. 21/45
D. 21/35
Answer: B, C, E
Step-by-step explanation:
For us to know if the options are correct, we just have to multiply the length the rope was cut into by the number of pieces and check if it equals 504 centimeter.
A. 12 pieces of 42.3 centimeter long rope.
= 12 × 42.3
= 507.6
This is wrong
B. 15 pieces of 33.6 centimeter long rope
= 15 × 33.6
= 504cm
This is correct
C. 16 pieces of 31.5 centimeter long rope
= 16 × 31.5
= 504cm
This is correct
D. 20 pieces of 25 centimeter long rope
= 20 × 25
= 500cm
This is incorrect
E. 35 pieces of 14.4 centimeter long rope
= 35 × 14.4
= 504cm
This is correct
Therefore, the correct option are B, C and E.