Question

Help i dunno the answer to it :

Answer 1

Answer:

5 miles per hour

Step-by-step explanation:

Let the speed of Kelly is $v_1$ miles per hour and speed of Raul is v₂ miles per hour.

Since, speed = $\frac{\text{Distance}}{\text{Time}}$

Kelly took 135 minutes to cover 90 miles from New York to Philadelphia.

∵ 1 minute = $\frac{1}{60}$ hours

∴ 135 minutes = $\frac{135}{60}$ = $\frac{9}{4}$ hours

v₁ = $\frac{90}{\frac{9}{4}}$

   = $90\times \frac{4}{9}$

   = 40 miles per hour

Raul took 153 minutes to cover the same distance as Kelly,

∵ 1 minute = $\frac{1}{60}$ hours

∴ 153 minutes = $\frac{153}{60}$ = $\frac{51}{20}$ hours

v₂ = $\frac{90}{\frac{51}{20}}$

    $=90\times \frac{20}{51}$                        

    = 35.29

    ≈ 35.3 miles per hours

v₁ - v₂ = 40 - 35.3

         = 4.7

         ≈ 5.0 miles per hours

Therefore, Kelly is 5 miles per hours faster than Raul.     

Answer 2

Answer:

5 mph

Step-by-step explanation:

No <3