**Question :** A train has a speed of 60 ππ/β. for the first one hour and 40 ππ/β for the next half hour. Its average speed in ππ/β is

(A) 50

(B) 53.33

(C) 48

(D) 70

**Answer :**

**Solution :**

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**Question :** A train has a speed of 60 ππ/β. for the first one hour and 40 ππ/β for the next half hour. Its average speed in ππ/β is

(A) 50

(B) 53.33

(C) 48

(D) 70

**Answer :**

**Solution :**