of  Delhi , and about 150 km north of  Jaipur , the  capital  of Rajasthan . Alwar was formerly the capital of the  princely state  of Alwar or Ulwar in  British India . India's highest ever recorded temperature of 50.6 °C (123.1 °F) was measured at Alwar on 10 May 1956. [ 1 ] Alwar has been