20. A car travels 70 km in 3 hours.
a) How much time is required to cover 30 km with the same speed?
b) Find the distance covered in 2 hours with the same speed?
Answers
Answered by
1
Answer:
Step-by-step explanation:
It is Direct Proportion
Therefore, x/y=k
a)70/3=30/y
= 90/70=y
1.30 hours
b) 70/3=x/2
=> 140/3=47 km
Answered by
6
a) 1.28 hours is required to cover 30 km with the same speed
b) 46.6 km covered in 2 hours with the same speed
Step-by-step explanation:
GIVEN
- Distance = 70 km
- Time = 3 hours
___________________________
TO FIND
- Time is required to cover 30 km with the same speed
- Distance covered in 2 hours with the same speed
___________________________
Speed
We know that,
- Speed = Distance / Time
- Speed = 70 / 3
- Speed = 23.3
- Speed = 23.3 km/h
Speed = 23.3 km/h
___________________________
a) Time is required to cover 30 km with the same speed
We know that,
- Speed = Distance / Time
- Time = Distance / Speed
- Time = 30 / 23.3
- Time = 1.28
- Time = 1.28 hours
Time = 1.28 hours
1.28 hours is required to cover 30 km with the same speed
___________________________
b) Distance covered in 2 hours with the same speed
We know that,
- Speed = Distance / Time
- Distance = Speed × Time
- Distance = 23.3 × 2
- Distance = 46.6
- Distance = 46.6 km
Distance = 46.6 km
46.6 km covered in 2 hours with the same speed
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