GATE Mechanical Engineering (ME) 2018 Shift 2 Solved Paper

Fatigue life of a material for a fully reversed loading condition is estimated from
${\mathit{\sigma }}_{\mathit{a}}=1100{\mathit{N}}^{-0.15}$
Where, ${\mathit{\sigma }}_{\mathit{a}}$ is the stress amplitude in MPa and is the failure life in cycles. The maximum allowable stress amplitude (in MPa) for a life of $1\times {10}^5$ cycles under the same loading condition is ___________(correct to two decimal places).