Question
If the diameter of a sphere is 63 cm, then what is the
total surface area of the sphere?Solution
diameter of sphere =63 radius of sphere =31.2cm now, total surface area sphere =4ฯr 2 =4ร22/7ร31.5ร31.5 = 4ร22/7ร992.25 =87318/7 =12474cm2
A boy goes to school with a speed of 70 km/h and comes back with a speed of 30 km/h. find his average speed?
Tina started running from a park at 10 m/s. 5 seconds after Tina left, Riya began running from the same spot and managed to catch Tina in 25 seconds. Fi...
- A delivery boy travels a certain distance from his warehouse to the customerโs house. At a speed of 15 km/h, he arrives 18 minutes late. But when riding ...
A boy goes to school with a speed of 75 km/h and comes back with a speed of 45 km/h. find his average speed?
A car travels from point A to point B in 4 hours, covering a distance of 180 km. On the return journey, the speed is reduced by 20%. How much time does ...
Pranav went to the bank at the speed of 60 km/h while returning for his home he covered the half of the distance at the speed of 10 km/h, but suddenly h...
A bus of length 150 meters can cross a signal post in 6 seconds. A second bus traveling at three times the speed of the first bus can cross a car travel...
- Maya has to go to the airport. If she drives at 36 km/h, she arrives 1.5 hours late. If she drives at 60 km/h, she reaches 45 minutes early. What is the di...
A jeep travels 270 km in 3 hours. The bike runs 7 m/s slower than the jeep. How much distance (in metres) will the bike cover in 2 minutes?
The speed of ‘A’ and ‘B’ is 65 km/hr and 40 km/hr, respectively. If the distance covered by ‘A’ in ‘x&r...
Relevant for Exams:
