Question

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Answer 1

Answer:

answer 31

Step-by-step explanation:

Correct option is

A

31

From figure △DAC  and  △EBC are right angled triangle.

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So, by pythagorous theorem, we get

AC=24m  And,  CB=7m

Width of the street  =AC+CB

⟹24+7=31m

Answer 2

Step-by-step explanation:

AB= Ladder = c=25 m

AC= Distance from the foot of the tower= b= 7 m

BC= Distance at which the ladder touches the wall. a= ?

So a^2 = c^2 -b^2

= a= √(25^2–7^2)

= √(625–49)

=√576= 24.

So the ladder touches vertical towel at a distance of 24- metres. When it slides 4- metres, then

a=20

c= 25

b=?

So b= (25^2–20^2)^0.5= 225^0.5 = 15.

Therefore when the ladder slides 4- metres from the tower, the distance from the foot of the ladder will he 15 metres from the ground.

So the ladder will slide a distance of (15–7)= 8- metres.

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