Structural Design Specifications - Engineering

Q1:

The over all depth of a solid slab is 20 cm and effective depth is 15 cm. The horizontal distance between parallel main reinforcement should not be more than

A 30 cm

B 40 cm

C 45 cm

D 60 cm

ANS:A - 30 cm

Here the effective depth of slab is mentioned if not then obviously be the smaller one, also they mentioned should not be more than, means 30cm is also possible but the greater here is 45cm, so 45 is the correct answer.