Скачать или смотреть SURFACE AREAS AND VOLUMES- MATHS NCERT EXEMPLAR SOLUTIONS- EX-12.3- Q11 TO Q14

SURFACE AREAS AND VOLUMES- MATHS NCERT EXEMPLAR SOLUTIONS- EX-12.3- Q11 TO Q14

Ex-12.3
Short Answer Type Questions:
Question 11
How many spherical lead shots each of diameter 4.2 cm can be obtained from a solid rectangular lead piece with dimensions 66 cm, 42 cm and 21 cm?
Question 12
How many spherical lead shots of diameter 4 cm can be made out of a solid cube of lead whose edge measures 44 cm.
Question 13
A wall 24 m long, 0.4 m thick and 6 m high is constructed with the bricks each of dimensions 25 cm x 16 cm x 10 cm. If the mortar occupies 1/10 th of the volume of the wall, then find the number of bricks used in constructing the wall.
Question 14
Find the number of metallic circular disc with 1.5 cm base diameter and of height 0.2 cm to be melted to form a right circular cylinder of height 10 cm and diameter 4.5 cm.

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