Question
Clear nights are colder than cloudy nights because of
–Solution
Cloudless nights are colder because the nights that have clouds provide a blanket for the earth and trap some of the hot day air where as the cloudless nights have no protection so all the hot air rises up into the sky. radiation is a process in which energetic particles or energetic waves travel through vacuum, or through matter-containing media that are not required for their propagation.
The speed of a car is 25% more than that of a bike. If the time taken by the car to cover (3x + 20) km is equal to the time taken by the bike to cover ...
A truck travels from depot ‘D’ to warehouse ‘W’. If it moves at 80 km/h, it reaches 1 hour early. If it moves at 60 km/h, it reaches 1 hour late...
'A’ and ‘B’ started moving towards each other at same time with a speed of 8 km/hr and 10 km/hr, respectively. If the distance covered by ‘A’ ...
A person travels from town A to town B, a distance of 20 km, at 4 km/h, and then from B to C, a distance of 30 km, at 5 km/h. What is his average speed ...
A car which is moving at a speed of 60 km/hr overtakes a bus which is 800 metres ahead of it in 2 minutes. If the speed of the truck is 50% more than th...
A truck travels a distance of 240 km in 8 hours. The speed of a van is 25% more than that of the truck, and the speed of a scooter is 20% more than that...
A thief is spotted by a policeman from a distance of 200 m. When the policeman starts chasing, the thief also starts running. If the speed of the thief ...
Buses start from a bus terminal with a speed of 20 km/hr at intervals of 12 minutes. What is the speed of a boy coming from the opposite direction towar...
- Two buses ‘R’ and ‘S’, which were 880 km apart, started traveling towards each other at the same time and met after 5.5 hours. If the speed of bus ...
A train running at 72 km/hr takes 20 seconds to pass a platform and the train takes 6.5 seconds to pass a car running at 36 km/hr in the opposite direct...
Relevant for Exams:
