Asked by MOHIT CHAWLA | 23rd Jun, 2011, 10:43: PM

Expert Answer:

For this you can prepare a model on making a periscope. It is there on our website. Please check the following link:

Answered by  | 28th Jun, 2011, 10:15: AM

Queries asked on Sunday & after 7pm from Monday to Saturday will be answered after 12pm the next working day.