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a, , Ratio and Proportion, , , , , , Mental Maths | as |, Se, , ~, hme, , ill in the blanks., , 1. Ifw.x,y, and are in proportion, then * =, 2. The simplest form of ratio 45 paise to 71 is, , 3. The ratio of 2 weeks to 21 days is r, , 4. Ifa car covers 140 km in 4 hours, then it will cover km in 3 hours., , §. The ratio of 1 m 40 cm to 35 cm in its simplest form is, 6. In the ratio a: b, a and b are called and respectively., , 7. The lowest form of the ratio a dozen to a score is, , 8. The value of xin9: 15::x:5is :, p-5ES : 12 are in proportion, then the value of x is, 10. Ifx-: 15-4: 6 are in proportion, the value of x is, , , , ___, , ES Multiple-Choice Questions, , , , 1. Ifthe cost of 2 dozen pens is 7120, then find the cost of 4 pens., , (a) 25 (b) 230 (c) %10 (d) 20, 2, The ratio of 30 cm to 1.5 m in its simplest form is 4, , (@) 1:15 io)3':'5 (c) 30:15 (aaa 5, 3, The ratio of 6 hours to 2 days in its simplest form is ;, , (a) 1:4 (b) 3:1 Ces (d) 4:6, 4. Which of the following is an equivalent ratio to 2 : 32, , (a) 4:6 (b) 1:4 (c) 4:1 (d) 3:2, , ence, , , , , , =

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ies, 8., D., , 10., , E, a., , he 10, , , , , , (c), +m, n, and p are in pror, (b) Im= np :, , @) Ip=my,, , , , 5:6 (d) 1:4, portion?, , 169: 15. Sy (c) In=mp (d) none of these, as *: 25, then the value Of x is, ‘ ee, (b) 15, Ee 5 35 d) 20, If two numbers are ; pare = vee, es Te in the ratio of 5:9 and their sum is 84, then the smallest number is, = (b) 90, a ; (c) 54 (d) 30, Which of the follow M8 is true if a, b, and care in Proportion?, ie, @ . ab (b) c=ba () B=ac (d) @=be, The simplest form of the Tatio 75 : 375 is, ee] 5 pas, (a) (b) 1:5 (c) 5:25 (d) 25:5, , , , Work it Our, , , , Find the ratio of boys to balls for each of the following., plore So etait aS, S.No. | Balls, , , , , , |) ik ep Cy Gy By, , Also identify the equivalent ratios., , Ratio, , , , ) Cy), , er Sp &y &y Uy Gy wy, , , , , , A, a KR ro), a, , (d), , we eww, RR YVYWYHOYW, , , , OO

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2. Express the following in three different Ways as shown in the given table. Also write the ratios in their, simplest forms., , , , , , , , Fraction form Ratio form In words Simplest form |, 2 : 2, (a) |2mtoSm 5 2S 2isto5 5, 3, St é 2, (b) | 150. emto 1m w 3:2 3 is to2 5, , , , (c) | 20 min to 6 min, (d) | 4h to 3 days, , | (e) |Smto 10cm, , | @ |25p to %2, , (g) [8 gto 160g, , , , , , , , , , , , , , , , , , , , , , , , , , | (hy 13 kmto 150m, , , , , , , 1. Anshul deposits $9500 in a bank and earns %665 as interest. What sum of money should he deposit, in order to get $945 as interest if the rate of interest and time are the same? |, , 2. A distance of 300 km between Delhi and Jhansi is Tepresented on a ma), , the distance between Delhi and Jhansi is shown as 7 cm, what is the ac!, cities?, , p by 4 cm. If on the same map, tual distance between the two, , 3. Ona Sunday, Pawan arranged a business lunch for 21 people and it cost him %12,600. Next Sunday, , Pawan spent 37,800 for the same lunch with his colleagues. How many colleagues were invited for, lunch?