Question
Curved surface area of cylinder is 646.8 cm2.
If ratio of radius to height of the cylinder is 10:4 respectively, then find the base area of the cylinder.Solution
Let radius and height of the cylinder is lsquo;15xrsquo; cm and lsquo;14xrsquo; cm respectively. So, 2 times; (22/7) times; 15x times; 14x = 646.8 Or, x2 = 0.49 Or, x = 0.7 Radius of cylinder = 15 times; 0.7 = 10.5 cm Desired area = 22/7 times; 10.5 times; 10.5 = 346.5 cmsup2;
- The ratio of the lengths of the diagonals of a rhombus is 4:7, and their difference is 18 cm. Calculate the area of the rhombus.
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