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20. The length of a room exceeds its breadth by 30 cm. If the length is increased by 30 cm andthe breadth is decreased by 20 cm, the arearemains the same. Find the length and breadthof the room.A. 120 cm, 150 cm B. 130 cm, 140 cmC. 110 cm, 160 cm D. 140 cm, 160 cm |
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Answer» Let the breadth of the room be X m. Therefore, length =x+3 m According to the given CONDITION, x(x+3)=(3+x+3)(x−2) 3x+x 2 =(6+x)(x−2) 3x+x 2 =6x−12+x 2 −2x x=12 Therefore, length = x+3=15m Breadth = x=12mStep-by-step EXPLANATION:MARK AS BRAINLIEST |
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