Question

The odometer of a car reads 1000km at the start of the urip and 1400km at the end of the trip. If the trip took 4h, calculate the speed of the car in km/h and m/s​

Answer 1

Answer:

in km/h->100km/h in m/sec->27.5m/s

Explanation:

Distance-400km

Time-4h

Speed-400/4=100 km/h

100×5/18nearly equals to 27.5m/s

Answer 2

Provided that:

• The odometer of a car reads 1000 km at the starting of the trip.

• The odometer of a car reads 1400 km at the ending of the trip.

• The trip took 4 hours.

To calculate:

• Speed of the car in kmph.

• Speed of the car in mps.

Solution:

• Speed of the car in kmph = 100 kmph

• Speed of the car in mps = 27.77 mps

Using concepts:

• Formula to convert km-m
• Formula to calculate speed
• Formula to find distance
• Formula to convert hr-sec

Using formulas:

• Formula to convert km into m:

• ${\small{\underline{\boxed{\pmb{\sf{1 \: km \: = 1000 \: m}}}}}}$

• Formula to calculate speed:

• ${\small{\underline{\boxed{\pmb{\sf{Speed \: = \dfrac{Distance}{Time}}}}}}}$

• Formula to find distance:

• Distance = Reading of odometer at the ending of trip - Reading of odometer at the starting of trip.

• Formula to convert hour into sec:

• ${\small{\underline{\boxed{\pmb{\sf{1 \: hr \: = 3600 \: sec}}}}}}$

Required solution:

~ Firstly calculating distance in kilometres by using suitable formula!

→ Distance = Reading of odometer at the ending of trip - Reading of odometer at the starting of trip.

→ Distance = 1400 - 1000

→ Distance = 400 kilometres

~ Now calculating speed in kilometre per hour by using suitable formula!

→ Speed = Distance/Time

→ Speed = 400/4

→ Speed = 100 kmph

~ Firstly converting hour into seconds!

→ 1 hour = 3600 seconds

→ 4 hour = 4 × 3600 seconds

→ 4 hour = 14400 seconds

~ Now converting km into m!

→ 1 km = 1000 m

→ 400 km = 400 × 1000 m

→ 400 km = 4,00,000 m

~ Now calculating speed in metre per second by using suitable formula!

→ Speed = Distance/Time

→ Speed = 400000/14400

→ Speed = 4000/144

→ Speed = 27.77 mps