Question

Please help me....Give the solution completely

Answer 1

1st we put a a formula of convex lence is 1/v - 1/u =1/f

• we have given the f=10 cm and u= -30
• 1/v-(-1/30) = 1/10
• 1/v +1/10=1/30
• 1/v=1/10-1/30
• 1/v=3-1/30
• v=15