Question

8th science ncrt workbook pg no 38​

Answer 1

Answer:

Given the height of cylindrical tank =h=1.4 m

And Radius of cylindrical tank =56 cm =0.56 m

So the Metal sheet required to make cylindrical tank are = total surface area of cylindrical tank= 2πr(r+h)

= 2×

7

22

×0.56(1.4+0.56)

= 2×22×0.08×1.96=6.8992m

2

Then metal sheet required = 6.9m

2