Question

Boats and aeroplanes are ................. so as to reduce fluid friction.fill in the blank.

• A. large
• B. broader
• C. streamlined
• D. bigger

Answer 1

The correct option is C streamlined

Boats and aeroplanes are streamlined so as to reduce fluid friction.
Aeroplanes, boats, fishes and birds which move through fluids have bodies of special shape, called streamlined shape, so as to reduce the friction due to fluid and avoid energy loss.
For example,if the boat isn't streamlined, then it also has to push the water out of its way, increasing the drag force.