Question

14
1. City A is to the west of B. A steady wind blows from
east to west. The total time taken by a flight
(assuming zero stoppage time) to make a round trip
from A to B and back to A is reduced by 20% when
the speed of the flight increases by 100% and the
speed of the wind increases by 300%. Find the ratio
of the speed of the flight to the speed of the wind.
(A) 2:1 (B) 3:2 (C) 3:1
(D) 4:1​

Answer 1

Answer:

I don't know.

Step-by-step explanation:

Sorry dear

Answer 2

Answer:

4:1

Step-by-step explanation:

Solve using options, for 4:1

let distance from A to B be 1 unit

former time taken for round trip= 1/(4-1) +1/(4+1)

Later speed of plane inc by 100% and wind by 300%

New speed of plane= 8 unit

wind= 4 unit

later time = 1/(8-4)+ 1/(8+4)

difference = former- later is given as 20% or 1/5

so these 2 times should satisfy this condition

1/3+1/5-(1/4+1/12)= 1/5 satisfying so ans