1.

1). 1352). 146.313). 150.624). 216.67

Answer»

Given,

Speed of person from point N to L = 65km/hr

Let Speed of person from point L to N be a km/hr.

AVERAGE speed for the whole journey = 100 km/hr.

If distance of whole journey is same then average speed of journey is =

⇒ 100 = (2 × a × 65)/(65 + a)

6500 + 100A = 130a

⇒ 6500 = 30a

⇒ a = 6500/30

⇒ a = 216.67

∴ Speed of person from point L to N is 216.67 km/hr.



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