Question

Which one from the following is not the 20th centuary contribution?
1 point
(a) Electric train
(b) Motorised boats
(c) Monorail
(d) Supersonic aeroplanes

answer fast​

Answer 1

Answer:

(b) Motorised boats

Explanation:

A motorboat, speedboat or powerboat is a boat that is powered by an engine.

Some motorboats are fitted with inboard engines, others have an outboard motor installed on the rear, containing the internal combustion engine, the gearbox and the propeller in one portable unit.

Answer 2

Answer:

Answer (d)

Explanation:

Supersonic aeroplanes