Question

. Fill in the blanks using a word. Write the answers in your answer sheet against the correct blank number. 2

Passenger airplanes mostly fly (a) _______ speeds less than that (b) _______ sound. Airplanes (c) _______

can fly (d) _______ greater speeds have been built. This is (e) _______ if they fly (f) _______ speeds greater

(g) _______ the speed of sound, (h) _______ fuel consumption increases enormously.​

Answer 1

Answer:

Passenger airplanes mostly fly at speeds less than that of sound. Airplanes which can fly at greater speeds have been built. This is because if they fly at speeds greater than sound, the fuel consumption increases enormously.