EASY
7th CBSE
IMPORTANT
Earn 100

Find the width of the cardboard, if its area is 52 sq.cm and its length is 13 cm.

50% studentsanswered this correctly

Important Questions on Perimeter and Area

MEDIUM
7th CBSE
IMPORTANT
Active Teach Maths Ace>Chapter 15 - Perimeter and Area>MENTAL MATHS>Q 3
The perimeter of a rectangle is 40 m. Its length is 4 m less than five times its breadth. Find the dimensions of the rectangle.
MEDIUM
7th CBSE
IMPORTANT
Active Teach Maths Ace>Chapter 15 - Perimeter and Area>MENTAL MATHS>Q 4
If the ratio of the areas of two squares is 9:1, find the ratio of their perimeters.
EASY
7th CBSE
IMPORTANT
Active Teach Maths Ace>Chapter 15 - Perimeter and Area>MENTAL MATHS>Q 5
Find the radius of a circle whose circumference is 22π. (Take π=227)
EASY
7th CBSE
IMPORTANT
Active Teach Maths Ace>Chapter 15 - Perimeter and Area>MENTAL MATHS>Q 6
If the base of a triangle is twice its altitude and the altitude is 2x, then the area of the triangle is 4xk. Find the value of k.
EASY
7th CBSE
IMPORTANT
Active Teach Maths Ace>Chapter 15 - Perimeter and Area>MENTAL MATHS>Q 7
The area of a parallelogram with side 12 cm is 96 cm2. If the length of its altitude is k cm, find the value of k.
MEDIUM
7th CBSE
IMPORTANT
Active Teach Maths Ace>Chapter 15 - Perimeter and Area>MENTAL MATHS>Q 8
The ratio of the circumferences of two circles 2:5. Find the ratio of their areas.
MEDIUM
7th CBSE
IMPORTANT
Active Teach Maths Ace>Chapter 15 - Perimeter and Area>MENTAL MATHS>Q 9
The area of a triangular field is 1.5 hectares. If the altitude is 300 m, find the corresponding base.
MEDIUM
7th CBSE
IMPORTANT
Active Teach Maths Ace>Chapter 15 - Perimeter and Area>MENTAL MATHS>Q 10
The width of a circular track with outer circumference 264 m and inner circumference 220 m is k m. Find the value of k.