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The average height of 5 boys is 175 cm. ...

The average height of 5 boys is 175 cm. A sixth boy joined the group and the average height of all the boys in the group now increased by one centimeter. The height of the sixth boy is:
5 लड़कों की औसत लंबाई 175 सेमी है | एक छठा लड़का समूह में शामिल हो जाता है तथा सभी लड़कों की औसत लंबाई एक सेमी से बढ़ जाती है | छठे लड़के की लंबाई कितनी होगी ?

A

175 cm

B

179 cm

C

180 cm

D

181 cm

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