Question : Meena completed a journey in 33 hours. She travels one-fourth distance of the journey at the speed of 60 km/hr and the remaining distance at 40 km/hr. What is the total journey in km?
Option 1: 1220 km
Option 2: 480 km
Option 3: 1440 km
Option 4: 680 km
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Correct Answer: 1440 km
Solution : Let the total distance of the journey be D. Meena travels one-fourth of the distance at the speed of 60 km/hr and the remaining distance at 40 km/hr. $\text{Time} = \frac{\text{Distance}}{\text{Speed}}$ The time is taken for the journey as, $⇒\frac{D}{4\times 60} + \frac{3D}{4\times 40} = 33$ $⇒\frac{D}{240} + \frac{3D}{160} = 33$ $⇒2D + 9D = 15840$ $⇒11D = 15840$ $\therefore D=1440$ km Hence, the correct answer is 1440 km.
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Question : A man covers half part of a certain distance at 60 km/hr. He covers 40% of the remaining distance at the speed of 12 km/hr and covers the rest of the distance at the speed of 18 km/hr. What is his average speed for the entire journey?
Option 1: 24 km/hr
Option 2: $\frac{58}{3}$ km/hr
Option 3: 36 km/hr
Option 4: 40 km/hr
Question : A man covers half part of a certain distance at 35 km/hr. He covers 40 percent of the remaining distance at the speed of 8 km/hr and covers the rest of the distance at the speed of 18 km/hr. What is his average speed for the entire journey?
Option 1: $\frac{920}{47}$ km/hr
Option 2: $\frac{680}{47}$ km/hr
Option 3: $\frac{840}{47}$ km/hr
Option 4: $\frac{760}{47}$ km/hr
Question : A man covers half part of a certain distance at 25 km/hr. He covers 40% of the remaining distance at the speed of 8 km/hr and covers the rest of the distance at the speed of 18 km/hr. What is his average speed for the entire journey?
Option 1: $\frac{650}{37}$ km/hr
Option 2: $\frac{540}{37}$ km/hr
Option 3: $\frac{600}{37}$ km/hr
Option 4: $\frac{480}{37}$ km/hr
Question : While going to the office, Sneha travels at a speed of 10 km/hr and on her way back, she travels at a speed of 15 km/hr. What is her average speed for the whole journey?
Option 1: 14 km/hr
Option 2: 12 km/hr
Option 3: 11 km/hr
Option 4: 13 km/hr
Question : A person covers a certain distance in 6 hours if he travels at 40 km/hr. If he has covered the same distance in 4 hours, then his speed must be:
Option 1: 50 km/hr
Option 2: 60 km/hr
Option 3: 80 km/hr
Option 4: 70 km/hr
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