If the length of a room is increased by 3 m and its breadth is decreased by 3m l, its area decreased by 15 m^2. if both length and breadth is decreased by 3m, its area increases by 63 m^2, by what percentage the length is more than breadth? show it by step by step calculation.

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step-by-step explanation:

answer

d. 10

explanation

the distance from point y to wx is the height of the triangle.

using pythagoras theorem,

group similar terms to get,

this implies that,

take positive square root of both sides to get,

this implies that,

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step-by-step explanation: