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Ishika Chaudhuri
Subject: Maths
, asked on 17/5/18
help me solve these 3 ques. plzz:
Q. 4 A cylindrical tub of radius 12 cm contains water to a depth of 20 cm. A spha•ical iron ball is dropped into the tub and thus the level of the water is raised by 6.75 cm. What is the radius of the sphere?
(1) 9 cm (2) 3 cm (3) 12 cm (4) 18 cm
Q. 5 The height ofa cone is 30 cm. A small cone is cut off at the top by a plane parallel to its base. If its volume be 1/27 ofthe volume of the give cone, at which height above the base is the section cut ?
(1) 10 cm (2) 20 cm (3) 15 cm (4) 30 cm
Q.6 Water in a canal, 30 dm wide and 12 dm deep, is following with a velocity of 20 km per hour. How much area will it irrigate in 30 min, if 9 cm of standing water is desired ?
(1) 2 x 10
^{5}
m
^{2 }
(2) 4 x 10
^{5}
m
^{2}
(3) 3 x 10
^{5}
m
^{2}
(4) 7 x 10
^{5}
m
^{2}
Answer
1
Jonathan Andrew
Subject: Maths
, asked on 3/4/18
In 'surface areas and volumes'which topic should i give more importance to?
Answer
1
Ruchika Srivastava
Subject: Maths
, asked on 26/3/18
Sir it is asking that which of the arrow in option below is pointing towrds north
Answer
1
Ruchika Srivastava
Subject: Maths
, asked on 26/3/18
6. The shape given below is made up of identical small squares
If the area of the whole shape is 24 cm
^{2}
, what is its perimeter?
1. 24 cm 2. 28 cm 3. 48 cm
Answer
1
Vaishnavi G
Subject: Maths
, asked on 26/3/18
The volume of a spere is 4851cm^3. How much should its radius be reduced so that its volume become 43123cm
Answer fast today is my test
Answer
1
Dakshesh Sharma
Subject: Maths
, asked on 20/3/18
Solve this:
Q2. Find the value of the polynomial p(x) = 5x- 4x
^{2}
+3 at x = -1
Q3. Write the coordinates of the origin?
Answer
1
Sunil Joshi
Subject: Maths
, asked on 18/3/18
Sir, we say that volume of the solid remains constant, even if we reform the solid or change its shape. If we take 2 plastic cylindrical glasses, in one of them if we fill full water and if we crush other glass a little and fill water in it completely after removing folds of crush in that glass and compare that to fully filled glass it seems that volume of crushed glass is lesser than volume of other glass. Doesn't it contradict above axiom? Please clear my doubt sir.
Answer
1
Prasad Aherkar
Subject: Maths
, asked on 15/3/18
Find the % Volume left when the largest possible sphere is kept in a cube
Answer
2
Dhruv Malhotra
Subject: Maths
, asked on 15/3/18
Solve this:
Q. The radius and slant height of a cone are in the ratio of 3 : 5. If its curved surface area is 2310
$c{m}^{2}$
. Find its radius, height and slant height. (Use
$\mathrm{\pi}=\frac{22}{7}$
)
Answer
1
Vaibhav Kumar
Subject: Maths
, asked on 14/3/18
A metal cylinder is melted and the whole mass is cast in the shape of the cube . what happens to its density ?
Answer
1
Shyam Sunder
Subject: Maths
, asked on 13/3/18
The total surface area of a cylinder is 462cm2. If its curved surface area is one third of its total surface area. Find its radius, height , and volume
Answer
2
Anup Tripathi
Subject: Maths
, asked on 6/3/18
9. Which of the following figures is a polyhedron?
Answer
4
Ashmita Suryavanshi
Subject: Maths
, asked on 5/3/18
the perimeter of a rectangle is 70cm . the length and breadth is in the ratio of 2:1 . find its area.
Answer
1
Yash
Subject: Maths
, asked on 3/3/18
2. Find the possible length and breadth of a rectangular plot of land that a farmer donated for construction of hospital which has the area A=25a2 - 35a+12. Which value of the farmer is appearing here ?
Answer
1
Vijaya Kowstubha T
Subject: Maths
, asked on 1/3/18
difference between LSA and inner LSA of cylindrical pipe of 28cm long is 176cmsq. find the outer and inner radius of pipe if it is made of 352cmsq of metal
Answer
1
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What are you looking for?

Q. 4 A cylindrical tub of radius 12 cm contains water to a depth of 20 cm. A spha•ical iron ball is dropped into the tub and thus the level of the water is raised by 6.75 cm. What is the radius of the sphere?

(1) 9 cm (2) 3 cm (3) 12 cm (4) 18 cm

Q. 5 The height ofa cone is 30 cm. A small cone is cut off at the top by a plane parallel to its base. If its volume be 1/27 ofthe volume of the give cone, at which height above the base is the section cut ?

(1) 10 cm (2) 20 cm (3) 15 cm (4) 30 cm

Q.6 Water in a canal, 30 dm wide and 12 dm deep, is following with a velocity of 20 km per hour. How much area will it irrigate in 30 min, if 9 cm of standing water is desired ?

(1) 2 x 10

^{5}m^{2 }(2) 4 x 10^{5}m^{2}(3) 3 x 10^{5}m^{2}(4) 7 x 10^{5}m^{2}If the area of the whole shape is 24 cm

^{2}, what is its perimeter?1. 24 cm 2. 28 cm 3. 48 cm

Answer fast today is my test

Q2. Find the value of the polynomial p(x) = 5x- 4x

^{2}+3 at x = -1Q3. Write the coordinates of the origin?

Q. The radius and slant height of a cone are in the ratio of 3 : 5. If its curved surface area is 2310 $c{m}^{2}$. Find its radius, height and slant height. (Use $\mathrm{\pi}=\frac{22}{7}$)