If the radius of a circle is increased to 3 times, then how many times will it’s circumference be increased?
A. 2times
B. 3times
C. 1/3 times
D. 9times
Areas
The area of a circle is increased by 22Sq.cm when it’s radius is increased by 1cm. The original radius of the circle is_________?
The area of a circle is increased by 22Sq.cm when it’s radius is increased by 1cm. The original radius of the circle is_________?
A. 6cm
B. 3.2 cm
C. 3 cm
D. 3.5 cm
The difference between the radi of the smaller circle and the bigger circle is 7cm and the difference between the area of two circles is 1078Sq.cm Radius of the smaller circle is_________?
The difference between the radi of the smaller circle and the bigger circle is 7cm and the difference between the area of two circles is 1078Sq.cm Radius of the smaller circle is_________?
A. 17.5cm
B. 21cm
C. 28cm
D. None of these
The area of a circle is 24.64Sq.m. the circumference of circle is________?
The area of a circle is 24.64Sq.m. the circumference of circle is________?
A. 14.64cm
B. 16.36m
C. 17.60m
D. 18.40m
The area of a square field is 6050 Sq.m.The length of it diagonal is_________?
The area of a square field is 6050 Sq.m.The length of it diagonal is_________?
A. 110m
B. 112m
C. 120cm
D. 135m
If the side of a square is increased by 25% then it’s area is increased by_________?
If the side of a square is increased by 25% then it’s area is increased by_________?
A. 25%
B. 40.5%
C. 55%
D. 56.25%
The area of a rhombus in 2016 Sq.cm and its side is 65cm. The length of its diagonals are________?
The area of a rhombus in 2016 Sq.cm and its side is 65cm. The length of its diagonals are________?
A. 125cm, 35cm
B. 126cm,32cm
C. 132cm,26cm
D. 135cm,25cm
The area of largest triangle that can be inscribed in a semicircle of radius R cm is__________?
The area of largest triangle that can be inscribed in a semicircle of radius R cm is__________?
A. 2R cm2
B. R2 cm2
C. 1/2 R2 cm2
D. 2 R2 cm2
Explanation:
Area of the largest triangle =(1/2 x 2r x r) Sq.cm =r2 Sq.cm
A typist uses a paper 30cm x 15cm.He leaves a margin at 2.5cm at the top and the bottom and 12.5cm on either side. What percentage of paper area is approximately available for typing
A typist uses a paper 30cm x 15cm.He leaves a margin at 2.5cm at the top and the bottom and 12.5cm on either side. What percentage of paper area is approximately available for tyg
A. 65%
B. 70%
C. 80%
D. 60%
Explanation:
Total area =(30 x 15)Sq.cm =45 Sq.cm
Area used =[(30 – 1.25 x 2) x (15 -2.5 x2)]
=(27.5 x 10)Sq.cm =275 Sq.cm
Percentage of area used =(275/450 x 100)% =61.1%
= 60%(Approx.)
The areas of two similar triangles are 12 cm2 and 48SQ. cm .If the height of the smaller one is 2.1cm than the corresponding height of the bigger one is_________?
The areas of two similar triangles are 12 cm2 and 48SQ. cm .If the height of the smaller one is 2.1cm than the corresponding height of the bigger one is_________?
A. 0.525cm
B. 4.2cm
C. 80%
D. 60%
Explanation:
The area of two similar triangles is the ratio of the square of the corresponding heights.
Therefore , 12/48 = (2.1)2 /h2
=> h2 = 4 x (2.1)2
=> h=(2 x 2.1)=4.2 cm