Annas car uses five liters of fuel per 100km. her father’s car uses seven liters of fuel per 100 km. petrol costs $2 a liter. anna

Question

Annas car uses five liters of fuel per 100km. her father’s car uses seven liters of fuel per 100 km. petrol costs $2 a liter. anna spends less her father on a 500km trip. how much less does she spend?

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Thành Đạt 1 month 2022-12-30T20:21:46+00:00 2 Answers 0 views 0

Answers ( 2 )

  1. Gerda
    0
    2022-12-30T20:22:50+00:00
    Reply
    Anna spends $20 less than her father on the 500 km trip.
    Given: Anna’s car uses 5 Liters per 100 km
    Her father’s car uses 7 Liters per 100 km
    Cost of petrol is $2 per Liter
    Anna spends less than her father on a 500 km trip. To find by how less Anna had spent than her father.
    Let’s solve the question:
    According to the question Anna’s car uses:
    5 Liters per 100 km or
    100 km is travelled with 5 Liters of petrol.
    Then 1 km is travelled by 5 / 100 Liters of petrol.
    1 km is travelled by 1 / 20 Liters of petrol by Anna.
    According to the question Anna’s father car uses:
    7 Liters per 100 km or
    100 km is travelled by 7 Liters of petrol.
    Then 1 km is travelled by 7 / 100 Liters of petrol.
    1 km is travelled by 7 / 100 Liters of petrol by Anna’s father.
    Now 500 km is travelled by:
    • Anna’s car: 1 km is travelled by 1 / 20 Liters of petrol. Then 500 km is travelled by
            500 × 1 / 20 Liters of petrol = 25 Liters of petrol.
            Therefore 500 km is travelled by 25 Liters of petrol.
    • Anna’s father car: 1 km is travelled by 7 / 100 Liters of petrol. Then 500 km is travelled by
            500 × 7 / 100 Liters of petrol = 35 Liters of petrol
            Therefore, 500 km is travelled by 35 Liters of petrol.
    Cost of petrol is $2 per Liter.
    Anna: She consumes 25 Liters of petrol for the 500 km journey.
    Her cost is 25 × 2 = 50
    Anna’s cost = $50
    Anna’s father: He consumes 35 Liters of petrol for the 500 km journey
    His cost is 35 × 2 = 70
    Anna’s father cost = $70
    Therefore, the difference in cost = (Anna’s father cost – Anna’s cost) = ($70 – $50) = $20.
    Hence Anna spends $20 less than her father on the 500 km trip.
    Know more about “unitary method” problems here: https://brainly.com/question/28276953
    #SPJ4

  2. thucuc
    0
    2022-12-30T20:22:54+00:00
    Reply
    Anna spends $20 less than her father on the 500 km trip.
    fuel used by Anna =  5 Liters per 100 km
    Fuel used by father = 7 Liters per 100 km
    Cost of petrol = $ 2 per Liter
    we need to find by how less Anna had spent than her father.
    By using the unitary method, we get that:
    Anna:
    500 × 1 / 20 Liters of petrol = 25 Liters of petrol.
    500 km is travelled by 25 Liters of petrol.
    Father:
    500 × 7 / 100 Liters of petrol = 35 Liters of petrol
    500 km is travelled by 35 Liters of petrol.
    Anna:
    Cost =  25 × 2 = $ 50
    Anna’s father:
    Cost = 35 × 2 = $ 70
    Difference in cost = $ 70 – $ 50 = $ 20.
    Therefore, Anna spends $20 less than her father on the 500 km trip.
    Learn more about unitary method here:
    brainly.com/question/28276953
    #SPJ4

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