Question

train goes at a speed of 20 miles per hour for the first 16 miles, at a speed of 40 miles per hour for 20 miles. it covers the last 10 miles at a speed of 15 miles per hour.find out the average speed​

Answer 1

Answer:

(A) 65 mph

(B) 68 mph

(C) 70 mph

(D) 75 mph

(E) 80 mph

Explanation:

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