Question
An element reacts with oxygen to give a compound with a
high melting point. This compound is also soluble in water. the element is likely to be:Solution
The correct answer is A
- A cyclist travelling at three-fourths of his usual speed takes 12 minutes longer than his usual time to cover a certain distance. Calculate the usual time ...
Buses A and B are moving around a circular ground of radius 140 m. If the speeds of the buses A and B are 15 m/sec and 20 m/sec respectively, then what ...
- If the ratio of speeds of ‘X’, ‘Y’ and ‘Z’ is 6:3:9 respectively, and ‘X’ takes 30 seconds to cover 360 metres, then find the time taken by...
Vicky and Vikram start running simultaneously around a rectangular track of length 840m from the same point at speeds of 40 km/hr and 32 km/hr. When wil...
The radius of a circular garden is 42 m. The distance (in m) covered by running 8 rounds around it, is: (Take )
The bike reduces its speed by 20 km/h and, because of this reduction, it takes 50% more time to cover the same distance as before. Find, the original sp...
- Sneha cycles to her tuition class at a speed of 20 km/h and ends up reaching 3 hours late. Had she pedalled at 25 km/h, she would have reached exactly on t...
- A car was moving at a speed of 50 km/hr for ‘x’ hours. Later, its speed increased by 10 km/hr and it continued to travel for (x + 5) hours more. If the...
Anju's journey comprises three segments. He travels the first 'd - 30' km at a speed of 12 km/h, the next 'd' km at a speed of 30 km/h, and finally, she...
If the speed ratio of A, B and C while covering the same distance is 7 : 3 : 1 then find the ratio of time taken by them.
Relevant for Exams:
