Subject
Quantitative Aptitude
Topic
Speed & Distance
Two cars start towards the same destination at the same time. One car is 5 km behind the other. If the speed of the car at the front is 750 m/minute and that of the other car is 1000 m/minute, after how many minutes will the two cars meet?
Two cars start towards the same destination at the same time. One car is 5 km behind the other. If the speed of the car at the front is 750 m/minute and that of the other car is 1000 m/minute, after how many minutes will the two cars meet?
ক)
20খ)
24গ)
25ঘ)
30ঙ)
none of theseExplanation
প্রথমে আমরা দুই car-এর মধ্যে relative speed বের করব: Relative speed = 1000 m/min - 750 m/min = 250 m/min এরপর, পিছনের car সামনের car-কে ধরতে কত সময় লাগবে তা হিসাব করব: সময় = দূরত্ব / relative speed = 5000 m / 250 m/min = 20 minute সুতরাং, দুটি car 20 minute পরে একই জায়গায় মিলিত হবে।Related questions
A man takes twice as long to row a distance against the stream as to row the same distance in favour of the stream. The ratio of the speed of the boat (in still water) and the stream is:Speed of a boat in standing water is 9 kmph and the speed of the stream is 5 kmph. A man rows to a place at a distance of 105 km and comes back to the starting point. The total time taken by him is:two trains are moving in opposite directions at 60 km/hr and 90 km/hr. Their lengths are 1/10 km and 9 km respectively. The time taken by slower train to cross the faster train in seconds is -A man can row three-quarters of a kilometre against the stream in 11×(1/4) minutes and down the stream in 7×(1/2) minutes. The speed (in km/hr) of the man in still water is:In a 300 m race A beats B by 5 metre or 6 seconds. B's time over the course is -A boatman goes 2 km against the current of the stream in 1 hour and goes 1 km along the current in 10 minutes. How long will it take to go 5 km in stationary water?A boat covers a certain distance downstream in 1 hour, while it comes back in 1x(1/2) hours. If the speed of the stream be 3 kmph, what is the speed of the boat in still water?A man buys tk 20 shares paying 9% dividend. The man wants to have an interest of 12% on his money. The market value of each share is-