Question

a car moves with the speed of 80km/hr for 15 mins and then 100km/hr for another 15 mins . what is the total distance covered by the car.

Answer 1

Explanation:

80÷4=20

100÷4=25

25km+20km=45

Answer 2

Given

• Speed₁ = 80 Km/hr
• Time₁ = 15 mins
• Speed₂ = 100 Km/hr
• Time₂ = 15 mins

To find

• Total distance of the car

Solution

Case 1 :-

• Speed = 80
• Time = 15

Speed = Distance / Time

Distance = Speed × Time

Time = Distance / Speed

• Distance = 80 × 15
• Distance = 80 × 1/4

1/4 of 1 hour = 15 minutes

• Distance = 20 Km

Case 2 :-

• Speed = 100
• Time = 15

Speed = Distance / Time

Distance = Speed × Time

Time = Distance / Speed

• Distance = 100 × 15
• Distance  = 100 × 1/4

1/4 of 1 hour = 15 minutes

• Distance  = 25 Km/hr

Total distance covered by car :-

• Case₁ Distance + Case₂  Distance
• 20 Km 25 Km
• 45 Km

∴ Total distance covered by car = 45 Km

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