16.A ladder, when leaned against a wall, reaches to height of 20m and the distance
between the wall and the foot of the ladder is 21m. Find the length of the ladder.
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Answer:
The length of ladder is 29 m.
Step-by-step explanation:
distance of ladder base and wall = 21m
height of wall , where the ladder touches = 20m
To find : length of ladder
Soln : Using pythagoras theorem
ladder² = 21² + 20²
ladder² = 441 + 400
ladder² = 841
ladder = root of 841
ladder = 29m
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