An aeroplane flying horizontally 1 km above the ground is observed at an elevation of `60o` . After 10 seconds, its elevation is observed to be `30o` . Find the speed of the aeroplane in km/hr.

An aeroplane flying horizontally,1km above the ground,is observed at an elevation of 60^(@) after 10 seconds,its elevation is observed to be 30^(@). Find the speed of the aeroplane in km/hr.

An aeroplane flying horiontally 1 km above the ground is observed at an elevation of 60^@ and after 10 seconds the elevation is observed to be 30^@ . The uniform speed of the aeroplane in km/h is

An aeroplane flying horizontally 900 m above the ground is observed at an elevation of 60°. After 10 seconds, the elevation changes to 30°. The uniform speed of the aeroplane (in km/hr) is

An aeroplane is flying horizontally at a height of 1.8km above the ground. The angle of elevation of plane X is 60^@ and after 20 seconds, its angle of elevation from X is become 30^@ .If point X is on ground, then what is the speed (in km/hr) of aeroplane?

An aeroplane flying horizontally at a height of 3 Km. above the ground is observed at a certain point on earth to subtend an angle of 60^@ . After 15 sec flight, its angle of elevation is changed to 30^@ . The speed of the aeroplane (taking sqrt3 = 1.732) is- कोई वायुयान पृथ्वी की सतह से 3 कि.मी. ऊपर क्षेतिज उड़ रहा है। पृथ्वी से किसी बिन्दु से यह देखने में आता है कि वह 60^@ के कोण पर कक्षांतरित होता है। 15 सेकण्ड बाद उसका उन्नयन कोण 30^@ परिवर्तित हो जाता हैं वायुयान की चाल बताइए। ( sqrt3 =1.732)

An airplane fling at constant speed parallel to the ground sqrt(3) km above. It is observe with angle of elevation 60^(0) from a point on the ground. After 5 seconds is elevation is 30^(0) then speed of aeroplane in km/hr is