70cm from pointBat left; virtual
40cm from pointBat right ;real
203cm from pointBat right ,real
70cm from pointBat right ,real
For first lens
1/V - 1/u = 1/f
1/V - 1/(-60) = 1/15
V = 203
For second lens
V = 203 - 60 = 143
1/V - 1/u = 1/f
1/V - 1/143 = 1/10
V = 70cm