Answer: It's the third one.
Explanation:
Answer:
Rigorous exercise
Explanation:
For your heart rate is been around 100 bpm you should be doing a rigorous exercise . but if ain't doing any rigorous exercise and your heart rate is constantly above 100 bpm you should consult your doctor.
An average heart is between 60 bpm to 100 bpm.
Answer:
Speed of sound is 30.91m/s
Explanation:
Speed is given by:
Speed = distance travelled / time taken
Given:
Distance travelled = 1020m
Time taken = 33seconds
Speed = 1020m/33s
Speed = 30.91m/s
Answer:

Explanation:
Let the car will overtake the truck after time "t" seconds
so here we can say that after time "t" seconds the distance covered by the car will be same as that of distance covered by truck
So we have

so we have


so now we have

