Calculate the number of moles of HCL (aq) added to the sodium thiosulphate​

Acommercial passenger jet can travel up to 970 km/hr at an altitude of 30,000 feet. at this speed, how long will it take the jet to travel 1,865 kilometers? a. 2.3 hrs b. 1.9 hrs c. 1.7 hrs d. 1.5 hrs

Could someone me find the answer to this problem.

The difference between a red shift and a blue shift has to do with wavelength frequency. t or f