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CBSE Class 7 Answered

a ladder of length 17m reaches  a window 8m above the ground on one side of a street and  at same   point  it reaches a window 15m in a wall on opposite side.find the width of the street
Asked by arajeevshashank | 25 Jan, 2018, 10:02: AM
answered-by-expert Expert Answer
begin mathsize 16px style From space the space diagram comma height space of space the space ladder space is space 17 space straight m Distance space between space ground space and space window space is space 8 space straight m. In space increment ABC comma AB squared plus BC squared equals AC squared 8 squared plus BC squared equals 17 squared BC squared equals 64 BC equals 8 space straight m From space the space second space diagram comma Height space of space the space ladder space is space 17 space straight m. Distance space between space ground space and space window space is space 15 space straight m. In space increment PQR comma PQ squared plus QR squared equals PR squared 15 squared plus QR squared equals 17 squared QR squared equals 64 QR equals 8 space straight m Width space of space the space street space is space 8 space straight m. end style
Answered by Sneha shidid | 25 Jan, 2018, 11:08: AM

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