Ice cream cones cost $2.80. How many ice cream cones can be bought with $42?
2 answers:
Answer: 15
Step-by-step explanation: It's your brothers birthday. You're walking around with your brother and his friends. You see an ice-cream shop and you want to buy yourself ice-cream, as well as your brother and his friends. Now, the ice-cream is $2.80 each, so you start counting how much friends he has including you and him, you count 15 in total and you have exactly $42 left, so you multiply $2.80 on 15 people and this is what she got:
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Answer:
The height of the tower = 420.48 meters
Step-by-step explanation:
For better understanding of the solution, see the figure attached below :
Let the height of the tower be x meters
Now, using the laws of reflection : angle of reflection = angle of incidence
Also, both the tower and the tourist are standing parallel to each other
⇒ ∠A = ∠i ( Alternate interior angles are equal)
Similarly, ∠D = ∠r ( Alternate interior angles)
But, ∠i = ∠r
⇒ ∠A = ∠D
Also, the tourist and the tower is perpendicular to the ground surface.
⇒ m∠B = m∠E = 90°
Now, in ΔABC and ΔDEC
∠A = ∠D (Proved above)
m∠B = m∠E = 90°
So, by AA postulate of similarity of triangles, ΔABC ~ ΔDEC
As the sides of similar triangles are proportional to each other
Hence, The height of the tower = 420.48 meters
