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MCOQ WORKSHEET-1, CLASS X: CHAPTER — 12, AREAS RELATED TO CIRCLES, , 1. The area of a circle is 49x cm, Its circumference is, (@)7ncm — (b) 14cm (@)21ncm_— (d) 28" cm, , 2. The perimeter of circular field is 242em. The area of the field is, (a) 9317 cm* (b) 18634 cm” (c) 4658.5 cm? (d) none of these, , , , 3. The area of a circle is 38.5 cm’, Its circumference is, (@)62em = (b) 121m) em = @) 22cm, , 4, The difference between the circumference and radius of a circle is 37 em. The area of the circle, is, (a) Lem? (6) 184m? (©) 154 em? (@) 259 cm*, , 5. The circumference of two circles are in the ratio 2 : 3. The ratio of their areas is, (a)2:3 4:9 (© 9:4 (@) none of these, , 6. On increasing the diameter of circle by 40%, its area will be increased by, (a) 40% (b) 80% (©) 96% (@) none of these, , 7. On decreasing the radius of the circle by 30%, its area is decreased by, (a) 30% (b) 60% (©) 45% (@) none of these, , 8. ‘The area of the square is the same as the area of the circle. Their perimeter re in the ratio, (adel (b) x: 2 ()2in (d) none of these, , 9. ‘The areas of the two circle are in the ratio 4 : 9. The ratio of their circumference is, (@)2:3 (4:9 © 9:4 4:9, , 10. In making 1000 revolutions, a wheel covers 88 km. The diameter of the ¥*, , @I4m (24m) 28m_—(d) 40m 174/258, , 11. The diameter of a wheel is 40 cm. How many revolutions will it make an, (a) 140 (b) 150 © 160 (d) 166, , 12. The radius of wheel is 0.25 m, How many revolutions will it make in covering 11 km?, (a) 2800 (b) 4000 () 5500) 7000, , 13. Find the circumference of a circle of diameter 21 cm., (@) 62cm —(b) 64em_— (©) 66em_—(d) 6S em, , 14, Find the area of a circle whose circumference is 52.8cm., (a) 221.76 em? (b) 220.76 em? (c) 200.76 cm* (@) none of these., , 15. A steel wire when bent in the form of a square, encloses an area of 121 sq. cm. The same wire is, bent in the form of a circle. Find the area of the circle. ., (a) 11m (b) 184m? (¢) 154 em* (d) 259 cm?, , , , , , a>
