Question
A right circular cone & a right circular cylinder
have equal base & equal height. If the radius of the base & the height are in the ratio 8:15, then ratio of total surface area of the cylinder to that of the cone isSolution
Let radius of cylinder & cone be 8x and height of cylinder & cone be 15x. So, slant height = √ (8x 2 + 15x 2 ) = 17x So, required ratio = 2 πR (H + R)/ π r (L + R) = 2(H + R)/(L+ R) = 2(8x + 15x)/(8x + 17x) = 46/25
4.5 times 5/0.9× 35% of 240 =?
Simplify the expression:
(4x² - 16) / (2x - 4)
116 ÷ 280 of 1/2 + 3/5 × 5/3 = ?
(23 × 8) – (13 × 5) + 67 =? x 6         Â
212 + 14 × 23 – 28 × 15 = ? Â
7(1/7)% of 3500 + 6(2/3)Â % of 6000 = ? + 552.5
5.45% of 1854 – 37.5% of 1096 = ? – 48% of 630
What value should come in the place of (?) in the following questions?
3(1/2) + 5(1/2) = ? + 4(3/8)
What will come in the place of question mark (?) in the given expression?
128 + 16 X 6 - ? = 88 + 4 X 26Â
{(8× 8 + 3 × 39) - 620 ÷ 20} = ?
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