Question

the base area of closed cylindrical water tank is 616 sq.m and height is 21m. let us write by calculating the total surface area of the tank.

Answer 1

Step-by-step explanation:

Area of base = 616 sq. m

Let the radius be x metre

Area of circle= 616 sq. m

πr2 = 616

22/7*r*r = 616

r*r= 616*7/22

r*r= 28*7

r*r=196

r=√196

r= 14 m

Height of cylinder= 21 m

Radius of cylinder= 14 m

Total surface area of cylinder=2πr(r+h)

2*22/7*14(14+21)

2*22*2*35

88*35

3080 sq.m

Answer 2

Answer:

Area of base = 616 sq. m

Let the radius be x metre

Area of circle= 616 sq. m

πr2 = 616

22/7*r*r = 616

r*r= 616*7/22

r*r= 28*7

r*r=196

r=√196

r= 14 m

Height of cylinder= 21 m

Radius of cylinder= 14 m

Total surface area of cylinder=2πr(r+h)

2*22/7*14(14+21)

2*22*2*35

88*35

3080 sq. M

Step-by-step explanation:

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