Question 7
A car covers first 39 km of its journey in 45 minutes and remaining 25 km in 35 minutes. What is the average speed of car during the whole journey ?
Solution
Average speed = $$\frac{(39 + 25) km}{(45 + 35) min}$$
= $$\frac{64 km}{80 min}$$
= $$\frac{64 \times 60}{80}$$ kmph
= $$48$$ kmph
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