▁double d ▁during ▁ 1 9 8 1 - 1 9 9 1 . ▁Rud rap ur ▁sur pass ed ▁J asp ur ▁in ▁ 1 9 7 1 ▁and ▁K ash ip ur ▁in ▁ 2 0 1 1 ▁to ▁become ▁the ▁second ▁most ▁popul ous ▁city ▁in ▁K uma un . ▁The ▁high ▁growth ▁rate ▁has ▁been ▁attributed ▁to ▁the ▁migration ▁of ▁people ▁from ▁upper ▁hills , ▁and ▁the ▁development ▁of ▁S ID C UL ▁Indust rial ▁Est ate ▁in ▁recent ▁years . ▁ ▁As ▁of ▁the ▁ 2 0 0 1 ▁India ▁census , ▁Rud rap ur ▁had ▁a ▁population ▁of ▁▁ 8 8 , 7 2 0 , ▁which ▁increased ▁to ▁ 1 4 0 , 8 5 7 ▁in ▁ 2 0 1 1 . ▁M ales ▁const itute ▁ 5 3 % ▁of ▁the ▁population ▁and ▁females ▁ 4 7 % ▁according ▁to ▁the ▁ 2 0 1 1 ▁census . ▁Rud rap ur ▁has ▁an ▁average ▁liter acy ▁rate ▁of ▁ 7 1 % : ▁male ▁liter acy ▁is ▁ 7 8 %, ▁and ▁female ▁liter acy ▁is ▁ 6 3 %. ▁In ▁Rud rap ur , ▁ 1 4 % ▁of ▁the ▁population ▁is ▁under ▁ 6 ▁years ▁of ▁age . ▁ ▁Religion ▁ ▁According ▁to ▁the ▁ 2 0 1 1 ▁Census ▁of ▁India , ▁ 8 0 . 2 9 % ▁people ▁in ▁Rud rap ur ▁were ▁H ind us . ▁ 1 5 . 7 6 % ▁people ▁followed ▁Islam , ▁making