Advertisements
Advertisements
प्रश्न
A wire of length 1320 cm is made into circular frames of radius 7 cm each. How many frames can be made?
Advertisements
उत्तर
Length of the wire = 1320 cm
Radius of each circular frame = 7 cm
Circumference of the frame 2πr units = `2 xx 22/7 xx 7 "cm"`
= 2 × 22
= 44 cm
∴ Number of frames made = `"length of the wire"/"circumference of one frame"`
= `1320/44`
= 30
30 frames can be made.
APPEARS IN
संबंधित प्रश्न
The radius of a circle is 7 cm. find the circumference of the circle.
The shape of the cross section of a canal is a trapezium. If the canal is 10 m wide at the top, 6 m wide at the bottom and the area of its cross section is `640m^2` , find the depth of the canal.
Choose the correct alternative answer for the following question.
If the perimeter of a square is equal to the circumference of a circle then the ratio of their areas is
Each wheel of a car is of diameter 80 cm. How many completer revolutions does each wheel make in 10 minutes when the car is traveling at a speed of 66 km per hour?
Find the area and perimeter of the circles with following: Radius = 2.8cm
Find the circumference of the circle whose area is 25times the area of the circle with radius 7cm.
The cost of fencing a circular field at the rate of Rs.250 per metre is Rs.55000. The field is to be ploughing at the rate of Rs.15 per m2. Find the cost of ploughing the field.
If the circumference of a circle is 352 metres, then its area in square metres is ____________.
