Explanation of question no 3 and 4 OF ex 13.4(Surface Areas and Volumes) #surfaceareaandvolumes #cbseclass9mathssurfaceareaandvolumes #cbseclass9mathssurfaceareaandvolumessolutions #class9 #cbse #ncertsolutions #ncert #chapter13class9thmath #chapter13ofmaths #chapter13 #mathschapter13solutions