The dirty secret of training in the 150/152 is that full tanks + two males put the a/c over gross - but not by much.
This makes the recommended speeds in the manual closer to what's needed than in a 172 with two up (remember that manual speeds are derived for full gross).
Two up in a 172 is considerably less than full gross, which makes the recommended speed in the manual a bit high.
Root(1900/2200)*65 = 60.4
But don't forget adding speed for wind and gusts.
Also your instructor doesn't mind the extra few kt if your airspeed control is woobly
