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Interactive video lesson plan for: NCERT Solutions for Class 10th Maths Chapter 13 Surface Areas and Volumes Ex 13.3

Activity overview:

https://www.youtube.com/watch?v=x-Bt76ovfJY&list=PLIyqDEkxKLd3fyR3B9YRXO4XVw9Z7verc
NCERT Solutions for Class 10th Maths Chapter 13 Surface Areas and Volumes Ex 13.3
00:10 Ex 13.3 Q 1
A metallic sphere of radius 4.2 cm is melted and recast into the shape of a cylinder of
radius 6 cm. Find the height of the cylinder.
02:40 NCERT Solutions for Class 10th Maths Chapter 13 Surface Areas and Volumes Ex 13.3 Q 2
Metallic spheres of radii 6 cm, 8 cm and 10 cm, respectively, are melted to form a single
solid sphere. Find the radius of the resulting sphere.
06:04 Q 3. A 20 m deep well with diameter 7 m is dug and the earth from digging is evenly spread out
to form a platform 22 m by 14 m. Find the height of the platform.
11:15 Q 4. A well of diameter 3 m is dug 14 m deep. The earth taken out of it has been spread evenly
all around it in the shape of a circular ring of width 4 m to form an embankment. Find the
height of the embankment.
14:58 Q 5. A container shaped like a right circular cylinder having diameter 12 cm and height 15 cm
is full of ice cream. The ice cream is to be filled into cones of height 12 cm and diameter
6 cm, having a hemispherical shape on the top. Find the number of such cones which can
be filled with ice cream.
21:56 Q 6. How many silver coins, 1.75 cm in diameter and of thickness 2 mm, must be melted to form
a cuboid of dimensions 5.5 cm × 10 cm × 3.5 cm?
28:35 Q 7. A cylindrical bucket, 32 cm high and with radius of base 18 cm, 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.
31:41 Q 8. Water in a canal, 6 m wide and 1.5 m deep, is flowing with a speed of 10 km/h. How much
area will it irrigate in 30 minutes, if 8 cm of standing water is needed?
36:45 Q 9. A farmer connects a pipe of internal diameter 20 cm from a canal into a cylindrical tank in
her field, which is 10 m in diameter and 2 m deep. If water flows through the pipe at the
rate of 3 km/h, in how much time will the tank be filled?

RD Sharma Class 10 Solutions Chapter 15 Areas related to Circles Ex 15.1 Q 1
http://www.learncbse.in/rd-sharma-class-10-solutions-areas-related-circles-ex-15-1-q1/
RD Sharma Class 10 Solutions Chapter 15 Areas related to Circles Ex 15.1 Q 2
http://www.learncbse.in/rd-sharma-class-10-solutions-areas-related-circles-ex-15-1-q2/



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RD Sharma Class 10 Solutions Chapter 16 Surface Areas and Volumes Ex 16.1 Q 15
http://www.learncbse.in/rd-sharma-class-10-solutions-surface-areas-volumes-ex-16-1-q15/
RD Sharma Class 10 Solutions Chapter 16 Surface Areas and Volumes Ex 16.1 Q 16
http://www.learncbse.in/rd-sharma-class-10-solutions-surface-areas-volumes-ex-16-1-q16/

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