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Nastasia [14]
3 years ago
10

a train can travel at a rate of 85 miles per hour at this rate how many hours would it take the train to go 102 miles

Mathematics
1 answer:
Darya [45]3 years ago
6 0

Given:

Speed of train = 85 miles per hour

Total distance = 102 miles

To find:

The time taken by train to cover 102 miles.

Solution:

We know that,

Speed=\dfrac{Distance}{Time}

On substituting the values, we get

85=\dfrac{102}{Time}

Time=\dfrac{102}{85}

Time=1.2

Therefore, the time taken by train to cover 102 miles is 1.2 hours.

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Answer:

50,00,70,000

Step-by-step explanation:

The given sequence is Arithmetic Progression.

Arithmetic Progression is a sequence in which every two neighbor digits have equal distances.

Here first we will find the number of terms

For finding the nth term, we use formula

aₙ = a + (n - 1) d

where, aₙ = value of nth term

a = First term

n = number of term

d = difference

Now, In given sequence: 12, 22, 32, 42, ⋯ , 100002

a = 12, d = 10, n = ? and  aₙ= 100002

∴ 100002  = 12 + (n - 1) × (10)

⇒ 99990 = 10(n - 1)

⇒ n = 10000

Now using the formula of Sum of Arithmetic Sequence,

Sₙ = n÷2[2a + (n - 1)d]

⇒ Sₙ = (10000÷2)[2 × 12 + 9999 × 10]

⇒ Sₙ = 5000 [ 24 + 99990]

⇒ Sₙ = 5000 × 100014 = 50,00,70,000

5 0
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katrin2010 [14]

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Answer:

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Step-by-step explanation:

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Step-by-step explanation:

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Step-by-step explanation:

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