Answer:
421160 Rupees
Step-by-step explanation:
Base area of cylinder = π × r^2
=> 616 = 22/7 × r^2
r^2 = (616 × 7) ÷ 22
= 4312 ÷ 22
= 196
Therefore r = √196
= 14 m
Total height of the tank = 20 m
Therefore height of cylinder
= 20 - 14
= 6 m
Volume of water tank
= Volume of cylinder + Volume of hemisphere
= π × r^2 × h + 2/3 × π × r^3
= 22/7 × 14 × 14 × 6 + 2/3 × 22/7 × 14
× 14 × 14
= 22/7 × 14 × 14 ( 6 + 2/3 × 14 )
= 616 ( 15.3 )
= 9424.8 m^3
= 9424800 l
( to convert m^3 to litre, multiply volume value by 1000 )
Total cost to fill water
= 9424800 × 45
= 424116000 paise
= 4241160 Rupees
