Question.1
If a wooden box of dimensions 8 m x 7 m x 6 m is to carry boxes of dimensions 8 cm x 7 cm x 6 cm, then find the maximum number of boxes that can be carried in the wooden box. [CBSE-14-GDQNI3W]
Answer.
Answer.
Question 2
. Two cubes of edge 6 cm are joined to form a cuboid. Find the total surface area of the cuboid. [CBSE-15-NS72LP7]
Answer. When two cubes are joined end to end, then
Length of the cuboid = 6 + 6 = 12 cm
Breadth of the cuboid = 6 cm
Height of the cuboid = 6 cm
Total surface area of the cuboid = 2 (lb + bh + hi)
= 2(12 x6 + 6×6 + 6×12)
= 2(72 + 36 + 72) = 2(180) = 360 cm2
Answer. When two cubes are joined end to end, then
Length of the cuboid = 6 + 6 = 12 cm
Breadth of the cuboid = 6 cm
Height of the cuboid = 6 cm
Total surface area of the cuboid = 2 (lb + bh + hi)
= 2(12 x6 + 6×6 + 6×12)
= 2(72 + 36 + 72) = 2(180) = 360 cm2
Question3
. Calculate the edge of the cube if its volume is 1331 cm3. [CBSE-15-6DWMW5A]
Answer.
Answer.
Question.4
If in a cylinder, radius is doubled and height is halved, then find its curved surface area.
Answer.
Answer.
Question 5. The radii of two cylinders of the same height are in the ratio 4 :5, then find the ratio of their volumes.
Answer.
Question 6. Find the area of the sheet required to make closed cylindrical vessel of height 1 m and diameter 140 cm.
Answer.
Question 9. Find the volume of cone of radius r/2 and height ‘2h’.
Answer.
10. How many balls, each of radius 2 cm can be made from a solid sphere of lead of radius 8 cm ? [CBSE-14-17DIG1U]
Answer.
Important Link
Quick Revision Notes : Surface Areas and Volumes
NCERT Solution : Surface Areas and Volumes
MCQs: Surface Areas and Volumes
Click here for Free Video Lectures
Discover more from EduGrown School
Subscribe to get the latest posts sent to your email.
