Question

7. What is the speed of the boat that travels 14 2/3 km in 7 1/2 hours ? (Hint:
Speed=Distance/Time)
8. Find x if 11/x =7/84

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Answer 1

Step-by-step explanation:

$(1)\\ speed = \frac{distance}{time} \\ \: \: \: \: \: \: \: \: \: \: \: \: = \frac{14 \frac{2}{3} }{7 \frac{1}{2} } \\ \: \: \: \: \: \: \: \: \: \: \: \: = \frac{ \frac{44}{3} }{ \frac{15}{2} } \\ \: \: \: \: \: \: \: \: \: \: \: \: = \frac{44 \times 2}{3 \times 15} \\ \: \: \: \: \: \: \: \: \: \: \: \: = \frac{88}{45} \\ \: \: \: \: \: \: \: \: \: \: \: \: = 1.956kmh {}^{ - 1}$

$(2) \\ \frac{11}{x} = \frac{7}{84} \\ 7x = 11 \times 84 \\ 7x = 924 \\ x = 132$

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