10. A ladder whose length is 13m reaches to a window of a house, which

1.	10. A ladder whose length is 13m reaches to a window of a house, which is 12m above theground. How far is the foot of the ladder from the foot of the house.
Answer» Let OA be the window of the HOUSE and AB is the ladder in the FIGURE. In ΔAOB by Pythagoras theorem AB² = OA² + OB² 13² = 12² + OB² 169 = 144 + OB² OB² = 169 - 144 OB² = 25 OB = √25 OB = 5 Hence, the DISTANCE of the FOOT of ladder from the foot of house is 5 cm.

10. A ladder whose length is 13m reaches to a window of a house, which is 12m above theground. How far is the foot of the ladder from the foot of the house.

Answer»

Let OA be the window of the HOUSE and AB is the ladder in the FIGURE.

In ΔAOB by Pythagoras theorem

AB² = OA² + OB²

13² = 12² + OB²

169 = 144 + OB²

OB² = 169 - 144

OB² = 25

OB = √25

OB = 5

Hence, the DISTANCE of the FOOT of ladder from the foot of house is 5 cm.

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10. A ladder whose length is 13m reaches to a window of a house, which is 12m above theground. How far is the foot of the ladder from the foot of the house.​

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10. A ladder whose length is 13m reaches to a window of a house, which is 12m above theground. How far is the foot of the ladder from the foot of the house.