A hydrogen filled balloon ascending at the rate of 18 kmph was drifted by wind. Its angle of elevation at 10th and 15th minutes were found to be 60° and 45° respectively. The wind speed (in whole numbers) during the last five minutes, approximately, is equal to __ km/h

Guddu halchal education
16-Feb-2020

26

Vikram Singh
19-Feb-2020

26

Saurav Kumar
20-Feb-2020

Ans (a)