Question
Download Solution PDFThe average height of 41 telecom towers which are arranged in an ascending order is 278 m. If the average height of first 20 telecom towers is 278 m and that of last 20 telecom towers is 278 m, then what is the height of 21st telecom tower? (In m)
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFGiven:
Average of 41 towers = 278 m
Average of 1st 20 towers = 278 m
Average of last 20 towers = 278 m
Concept used:
Calculation:
Average of 1 to 20 =
Average of 1 to 20 = 5560
Average of 21 to 41 =
Average of 21 to 41 = 5560
From the given data, towers are arranged in ascending order
⇒
Substitute (1) and (2) in (3)
⇒ 278 × 41 = 5560 + 5560 + 21st
⇒ 11398 = 11120 + 21st
⇒ 21st = 11398 - 11120
⇒ 21st = 278
∴ The height of 21st telecom tower is 278m.
Last updated on Jun 12, 2025
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