A) 1.5 km
B) 1.75 km
C) 2.25 km
D) 2.5 km
Correct Answer: B
Solution :
[b] Distance from his house \[\text{=}\frac{\text{Product}\,\,\text{of}\,\,\text{speed}}{\text{Difference}\,\,\text{of}\,\,\text{speed}}\,\,\text{ }\!\!\times\!\!\text{ }\,\,\text{total}\,\,\text{time}\] \[=\frac{\frac{5}{2}\times \frac{7}{2}}{1}\times \frac{12}{60}\] \[=\frac{35}{4}\times \frac{1}{5}=\frac{7}{4}=1.75\,km\]You need to login to perform this action.
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