Question
The ratio of the radii of the
bases of a cylinder and a cone is 7:8, while the ratio of their heights is 4:5. What is the ratio of the volume of the cylinder to the volume of the cone?Solution
ATQ,
Let r and R be the radii of the bases of the cylinder and the cone, respectively. r/R =7/8 Let h and H be the heights of the cylinder and the cone, respectively. h/H =4/5 The formula for volume ratio: 
Substituting values: 
Hence, the ratio of the volumes is 147:80.
2/5){(3/5) × 750 + 40% of 375} = ? × 16
What will come in the place of question mark (?) in the given expression?
(18 × 8 + 24) × 4 = ?
- What will come in the place of question mark (?) in the given expression?
(3247 + 1246 – 4329) × (9584 + 1245 – 10825) = ? 116*2/3% of 18600 + 666*2/3% of 1290 = 457*1/7% of 1750 + 555*5/9% of 3150 + ?
2 X 25 + (30% of 80) ÷ (10% of 120) = ?
What value should come in the place of (?) in the following questions?
(? ÷ √1444) * 15 = 30 * 45 ÷ 19
What will come in the place of question mark (?) in the given expression?
96 ÷ (9 - 6.6) + 17.5 X 6 = ? ÷ 8Â
What will come in the place of question mark (?) in the given expression?
? ÷ (33 - 12 X 2) = (24 + 50 - 38) ÷ ?Â
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