A salesman travels a distance of 70 miles in 2.5 hours. How much faster, in miles per hour, must he travel to make the same trip in 0.75 hours less than the original time?

A salesman travels a distance of 70 miles in 2.5 hours. How much faster, in miles per hour, must he travel to make the same trip in 0.75 hours less than the original time? Correct Answer 12

১ম ক্ষেত্রে, গতি = <math xmlns = "http://www.w3.org/1998/Math/MathML"><mfrac><mrow><mn>70</mn><mo>&#xA0;</mo></mrow><mrow><mn>2</mn><mo>.</mo><mn>5</mn></mrow></mfrac><mo>&#xA0;</mo></math>m/hr = 28m/hr ২য় ক্ষেত্রে, গতি = <math xmlns = "http://www.w3.org/1998/Math/MathML"><mfrac><mrow><mn>70</mn><mo>&#xA0;</mo></mrow><mrow><mn>2</mn><mo>.</mo><mn>5</mn><mo>&#xA0;</mo><mo> - </mo><mo>&#xA0;</mo><mn>0</mn><mo>.</mo><mn>75</mn></mrow></mfrac></math> m/hr = 40m/hr <math xmlns = "http://www.w3.org/1998/Math/MathML"><mo>&#x2234;</mo></math> গতি বাড়াতে হবে = (40–28) m/hr = 12m/hr
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