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Question
A tank of cylindrical shape has radius 2.8 m and its height 3.5 m. Complete the activity to find how many litres of water the tank will contain.
Capacity of water tank = Volume of cylindrical tank
= πr2h
Solution
Capacity of the tank = Volume of cylindrical tank
= πr2h
= 22/7 × 2.8 × 2.8 × 3.5
= 86.24 m3
= 86.24 × 1000 litre
= 86240 litre
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Solution :
The surface area of the sphere = 4πr2
= `4 xx 22/7 xx square^2`
= `4 xx 22/7 xx square`
= `square xx 7`
∴ The surface area of the sphere = `square` sq.cm.
