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Question

A man travels 100 miles at 20 miles per hour, 60 miles at 30 miles per hour and 80 miles at 10 miles per hour, what is his average rate for the three trips?

18 miles per hr

17 miles per hr

20 miles per hr

16 miles per hr

ANSWER : 4

Descrption

<p><span style = "box - sizing: border - box; font - size: 18px; color: #212529; font - family: bangla, sans - serif; text - align: justify; background - color: #ffffff;">Time travelled at 20 miles//hr  =  100/20  =  5 hrs</span></p>
<p><span style = "box - sizing: border - box; font - size: 18px; color: #212529; font - family: bangla, sans - serif; text - align: justify; background - color: #ffffff;">Time travelled at 30 miles//hr  =  60/30  =  2 hrs</span></p>
<p><span style = "box - sizing: border - box; font - size: 18px; color: #212529; font - family: bangla, sans - serif; text - align: justify; background - color: #ffffff;">Time travelled at 10 miles//hr  =  80/10  =  8 hrs</span></p>
<p><span style = "box - sizing: border - box; font - size: 18px; color: #212529; font - family: bangla, sans - serif; text - align: justify; background - color: #ffffff;">Total time travelled  =  5   +   2   +   8  =  15 hrs</span></p>
<p><span style = "box - sizing: border - box; font - size: 18px; color: #212529; font - family: bangla, sans - serif; text - align: justify; background - color: #ffffff;">Total travelled  =  100   +   60   +   80  =  240 miles</span></p>
<p><span style = "box - sizing: border - box; font - size: 18px; color: #212529; font - family: bangla, sans - serif; text - align: justify; background - color: #ffffff;">Average rate  =  240 / 15  =  <strong>16 miles per hour</strong></span></p>
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