Army ki vacany KB aayegi?
rpsc acf ka study material kis publisher ka accha h?
Who is the governer or UP
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