Question

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3. a) The rider fell of the horse suddenly.
b) Please make coffee as soon possible.
c) I passed the exam with yours help.
d) She dances very beautiful.
e) Will you please closed the door?
4. a) Has the students completed the exercise?
b) I walks to school every day.
c) Rahim always prefers coffee than tea.
d) He wrote the address and post the letter.
e) Chennai is a biggest city in Tamil Nadu.
a) India is a democracy country.
b) He fought bold like a lion.
c) I was born at 1940.
d) You can avail yourself by the choice.
e) This is a nine-metres cloth.
6. a) She is one of the important person in the office.
b) We have been lived in this house for 20 years.
c) It was rained throughout the night.
d) My friend make a phone call to me last evening.
e) Who has broke the glass window?
Myfather walk fast.

Answer 1

Answer:

Let the car turn off the highway at a distance x from the point D.

So, CD=x, and if the speed of the car in the field is ν, then the time taken by the car to cover the distance AC=AD-x on the highway

t1=AD-xην (1)

and the time taken to travel the distance CB in the field

t2=√l2+x2ν (2)

So, the total time elapsed to move the car from point A and B

t=t1+t2=AD-xην+√l2+x2ν

For t to be minimum

dtdx=0 or 1ν[-1η+x√l2+x2]=0

or η2x2=l2+x2 or x=l√η2-1

Explanation:

Answer 2

Answer:

4.a.have the students completed the exercise?

b.I walk to school every day

c.Rahim always prefers coffee to tea

d.he wrote the address and posted the letter

e.Chennai is the biggest city in Tamil Nadu.

Explanation:

its correct answer don't bother about it.