A cylinder tank of diameter 42 cm is full of a mixture of spirit and water. If 5.5 litres of spirit evaporates in a procedure then the mixture in the tank will reduce by:a) 252÷63cm B) 5cm C) 61÷189cm D) 19÷112<br />
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Answer:
250 / 63 cm.
Step-by-step-explanation:
Radius of cylinder = 42 cm / 2 = 21 cm
= > Volume disappeared = 5.5 Lt = 5500 cm^3
= > Volume disappeared = πr^2h { formula }
= > 5500 cm^3 = π( 21 cm )^2 h
= > 5500 cm^2 = 22 / 7 x 21 x 21 x h cm^2
= > ( 5500 x 7 ) / ( 22 x 21 x 21 ) cm = h
= > 250 / 63 cm = h
Hence, mixture in the tank is reduced by 250 / 63 cm.
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