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Solution


Q.

Your friend Veer wants to participate in a 200 m race. He can currently run that distance in 51 seconds and with each day of practice it takes him 2 seconds less. He wants to complete the race in 31 seconds.

Based on the above information answer the following question:

 

 

(i) Write AP for the given situation
1 51, 49, 47  
2 52, 49, 47  
3 51, 53, 47  
4 51, 50, 74  

Ans.

(1)

The general form of an AP is a, a + d, a + 2d, ...., where a is the first term and d is the common difference.

Here a = 51, d = –2 ∴ The required AP is: 51, (51 – 2), (51 – 4), .... ⇒ 51, 49, 47, ....