An automobile has two punctured tyres. The first puncture by itself would make the tyre flat in 10 minutes. The second puncture by itself would make the tyre flat in 5 minutes. How long would it take for both punctures together to make the remaining tyre flat ?
Correct Answer : A
Distance between A and B is 72 km. Two men started walking from A and B at the same time towards each other. The person who started from A travelled uniformly with average speed 4 kmph. While the other man travelled with varying speeds as follows: In first hour his speed was 2 kmph, in the second hour it was 2.5 kmph, in the third hour it was 3 kmph, and so on. When will they meet each other?
A man XY of height 1.75 cm stands at a distance of 4 metres from a pillar AB. If the pillar l is at the height of 5.25 m from the ground, what is the length of the man’s shadow on the ground?
Aunt uses a car to travel from Mumbai to Nasik. She travelled at 60 kmph and covered half the distance in 2 hours. At what uniform speed should she travel to reach Nasik at 4.00 pm?