Question
If each side of a cube is reduced by 50%, the surface
area will reduced by.Solution
50%=1/2  Side =2 Area=6×2×2=24m2 after decrease side-1 Area =6×1×1=6m2 Required Answer=24-6=18 (18/24)×100=75%.
A Boy plants a bomb at a place in Diwali and starts running at 30 m/s. After 54 seconds the bomb was blast. In how much time the sound of blast will be ...
The speed of a car is 40% less than the speed of a bike. The time taken by a bus to cover (d-100) km distance in 9 hours. The sum of the speed...
Two athletes start running on a circular track of length 1,500 metres in the same direction at speeds of 20 m/s and 18 km/h respectively. How many times...
A person travels at the speeds of 18kmph, 24kmph, and 12kmph on the surface of an equilateral triangle and the ground. Find the average speed of the ent...
- A spy is 1.8 km ahead of an agent who begins to chase him. The agent runs at a speed of 12 m/s, while the spy runs at 8 m/s. How much time will the agent t...
A man takes a total of 5 hrs 30 min by walking to a certain place and coming back by cycle. He would have gained 2 hrs 30 min by cycling both the ways. ...
A train covers a distance of 60 km at the speed of 45 km/h the next 30 km distance covers with a speed of 40 km/h and last 100 km with the speed of 80 k...
The speed of a bike increases by 4 km/hr after every 1 hour. If the distance travelled by the bike in 1st hour is 20 km, the find the total distance tra...
- A journey of 250 km is partly done by walking at 5 km/h and the rest by cycling at 25 km/h. If the entire trip took 11 hours, find the walking distance.
A man travels to his destination in 8 hours at his normal speed. If his speed decreases by (1/10) , he travels 40 km less in the same time. Determine hi...