Question
A boy is standing in front of a plane mirror at a
distance of 3 m from it. What is the distance between the boy and his image?Solution
The image formed by a plane mirror is always virtual upright, and of the same shape and size as the object it is reflecting. A virtual image is a copy of an object formed at the location from which the light rays appear to come
Quantity I. The perimeter of a triangle whose sides are 17 cm, 13 cm and 23 cm.
Quantity II. The perimeter of a square whose diagonal is 19 cm.
Quantity I. The perimeter of a triangle whose sides are 17 cm, 13 cm and 23 cm.
Quantity II. The perimeter of a square whose diagonal is 19 Â cm.
Quantity I. The volume of a cube whose surface area is 216 cm²
Quantity II. The volume of a cuboid whose sides are 8 cm, 9 cm and 13 cm.
A merchant earned a profit of Rs. 75 on the selling price of a sweater that cost the merchant Rs. 450.
Quantity I. The profit expressed as a perc...
Quantity I. The volume of a cube whose surface area is 216 cm²
Quantity II. The volume of a cuboid whose sides are 8 cm, 9 cm and 13 cm.
...What is the rate percent per annum?
Quantity I. Sum of money becomes four times in five years at simple interest.
Quantity II. The differe...
What is the rate percent per annum?
Quantity I. Sum of money becomes four times in five years at simple interest.
Quantity II. The dif...
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