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Solution


Q.

The Burj Khalifa, located in Dubai, United Arab Emirates, is the tallest tower in the world, standing at approximately 828 m. It features the highest observation deck open to the public. While walking on the deck, a person observed the shadows of the Burj Khalifa and nearby buildings. At one point, he noted that the shadow of the Burj Khalifa measured 207 m, while the shadow of a building named ‘P’ was 46 m long.

Based on the above information answer the following questions:

 

(iii) (a) What is the length of shadow of Burj Khalifa when the length of shadow of building ‘Q’ is 81 metres
1 355.5  
2 345.6  
3 364.5  
4 360.2  

Ans.

(3)

When length of shadow of building Q = 81 m = l, let length of the shadow of Burj Khalifa at the instant = x m.

828P=xl⇒828184=x81⇒x=81×828184=364.5 m