Question

JUCI
40.
d) 48 cm
A cylindrical cistern whose diameter is 21 cm is partly filled with water. If a rectangular block of iron 14
cm in length. 10.5 cm in breadth and 11 cm in thickenes is wholly immersed in water, then the raise in
water level is
​

Answer 1

Answer –18 cm

Explanation :

Volume of the Rectangular Block = 22 * 18 * 7

Radius of the Cistern = 7 cm

Area of the Cylinder = Π * r² * h = 22/7 * 7 * 7 * h

22/7 * 7 * 7 * h = 22 * 18 * 7; h = 18 cm