Two planks each of $$50mm \times 50 mm $$ section are glued together along the length to form a section 50mm \times 100 mm and used as a beam .If the shear force at a section is 1000 N ,What is the maximum shear stress on the glue ?

A

0.15 MPa

B

0.3 MPa

C

0.6 MPa

D

2.4 MPa