Uber chief executive Travis Kalanick says it has experienced "significant growing pains”. Photo: Sam Tsang Uber chief executive Travis Kalanick says it has experienced "significant growing pains”. Photo: Sam Tsang
Uber chief executive Travis Kalanick says it has experienced "significant growing pains”. Photo: Sam Tsang

Uber ride-sharing start-up now valued at US$40 billion

Uber chief executive Travis Kalanick says it has experienced "significant growing pains”. Photo: Sam Tsang Uber chief executive Travis Kalanick says it has experienced "significant growing pains”. Photo: Sam Tsang
Uber chief executive Travis Kalanick says it has experienced "significant growing pains”. Photo: Sam Tsang
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