Question

At a particular time of a day, a 7-m-high flagstaff casts a shadow which is 8.2 m long What is
the height of the building which casts a shadow 20.5 metres in length at the same moment?​

Answer 1

Answer:

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Step-by-step explanation:

Height of the flagstaff that casts a shadow of length 8.2 m = 7 m

Height of the building that casts a shadow of length 1 m = 78.2 m

Height of the building that casts a shadow of length 20.5 m = 78.2×20.5 m = 17.5 m

∴ The height of the required building is 17.5 m.