• 0
Newbie

## 30. A well of diameter 2 m is dug 14 m deep. The earth taken out of it is evenly spread all around it to form an embankment of height 40 cm. Find the width of the embankment.

• 0

Explain the question using, formulas given in the chapter. Class 10th, Cbse, RD Sharma, Surface area and volumes.

• 0
Newbie

## 29. A 16 m deep well with diameter 3.5 m is dug up, and the earth from it is spread evenly to form a platform 27.5 m by 7m. Find the height of the platform.

• 0

Explain the question using, formulas given in the chapter. Class 10th, Cbse, RD Sharma, Surface area and volumes.

• 0
Newbie

## 28. A path 2 m wide surrounds a circular pond of diameter 40 m. How many cubic meters of gravel is required to grave the path to a depth of 20 cm?

• 0

Explain the question using, formulas given in the chapter. Class 10th, Cbse, RD Sharma, Surface area and volumes.

• 0
Newbie

## 27. A spherical ball of radius 3 cm is melted and recast into three spherical balls. The radii of two of the balls are 1.5 cm and 2 cm. Find the diameter of the third ball.

• 0

Explain the question using, formulas given in the chapter. Class 10th, Cbse, RD Sharma, Surface area and volumes.

• 0
Newbie

## 26. A hollow sphere of internal and external radii 2 cm and 4 cm, respectively, is melted into a cone of base radius 4 cm. Find the height and slant height of the cone.

• 0

Explain the question using, formulas given in the chapter. Class 10th, Cbse, RD Sharma, Surface area and volumes.

• 0
Newbie

## 25. A hollow sphere of internal and external diameters 4 cm and 8 cm, respectively, is melted into a cone of base diameter 8 cm. Calculate the height of the cone.

• 0

Explain the question using, formulas given in the chapter. Class 10th, Cbse, RD Sharma, Surface area and volumes.

• 0
Newbie

## 24. The diameters of the internal and external surfaces of a hollow spherical shell are 6 cm and 10 cm, respectively. If it is melted and recast into a solid cylinder of diameter 14 cm, find the height of the cylinder.

• 0

Explain the question using, formulas given in the chapter. Class 10th, Cbse, RD Sharma, Surface area and volumes.

• 0
Newbie

## 23. A solid cuboid of iron with dimensions 53 cm x 40 cm x 15 cm is melted and recast into a cylindrical pipe. The outer and inner diameters of the pipe are 8 cm and 7 cm, respectively. Find the length of the pipe.

• 0

Explain the question using, formulas given in the chapter. Class 10th, Cbse, RD Sharma, Surface area and volumes.

• 0
Newbie

## 22. A solid metallic sphere of radius 5.6 cm is melted, and solid cones, each of radius 2.8 cm and height 3.2 cm, are made. Find the number of such cones formed.

• 0

Explain the question using, formulas given in the chapter. Class 10th, Cbse, RD Sharma, Surface area and volumes.

• 0
Newbie

## 21. A cylindrical bucket, 32 cm high and 18 cm of radius of the base, is filled with sand. This bucket is emptied on the ground, and a conical heap of sand is formed. If the height of the conical heap is 24 cm, find the radius and slant height of the heap.

• 0

Explain the question using, formulas given in the chapter. Class 10th, Cbse, RD Sharma, Surface area and volumes.