Question

39. A Fourteenth Century English narrative poem in rhyme about courtly love containing the elements of the
supernatural is known as
(A) Breton lay
(B) Breton lie
(C) Britain lay
(D) Britain le​

Answer 1

39. A Fourteenth Century English narrative poem in rhyme about courtly love containing the elements of the

supernatural is known as

(A) Breton lay

(B) Breton lie

(C) Britain lay

(D) Britain le

Answer 2

Answer:

Given that:-

A train running at a speed of 84 km/h

The train crosses a electric pole at 9 seconds

We need to find the length of the train.

Let's Do!

What we can do here, is first convert the given units into SI units.

84 km/h => m/s

1 metre = 1000 km

1 hour = 3600 seconds

\sf{Kmph = \dfrac{1000}{3600} = \dfrac{5}{18} \ After \ simplification}Kmph=

3600

1000

=

18

5

After simplification

So, we can now multiply 84 with 5/18

It was just a shortcut method, you can use it directly as well.

So, we get:-

\sf{\dfrac{84 \times 5}{18}}

18

84×5

\sf{ = 23.33 \ mps \ approximately}=23.33 mps approximately

mps means metre/second.

Now, we know that

\boxed{\sf{Speed = \dfrac{Distance}{Time} }}

Speed=

Time

Distance

\boxed{\sf{\mapsto Distance = Speed \times Time}}

↦Distance=Speed×Time

Now, we need is length ie Distance.

So, 23.33*9 = 209.97 metres is the length of the train.

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