Page 45 - Arithmetic

Answers:
1. c 2. a 3. C 4. b 5. e
Explanation:
1. Let’s the parts be 1x, 2x, 1x 234
𝑥+2𝑥+𝑥 =918or17𝑥 =918 234 12
x = 648
Second part is 2x or 432
3
According to the law of proportion, a × 8 = 1 × 4 15 9 5
2a = 1 ; a = 1 36
3. Let the cost of car be 8x and the bike be 3x.
Cost of car = 12000 + 3x or 8x = 12000 + 3x, 5x = 12000 x = 2400
Cost of car = 8x = 8 × 2400 = $192000
4. Ratio of speed of cars = 3:4:6 d = s × t or t = 𝑑
𝑠
As distance or ‘d’ is constant, the ratio of time taken by the cars would be 1 : 1 : 1 346
or 4:3:2
5. AmountofSilverinR= 9 + 5 =14=7
AmountofGoldinR= 7 +11=18=9 16 16 16 8
Ratio of Silver: Gold = 7:9
2. Leta:1::4:8 9 515
16 16 16 8
Page 44 of 55
Arithmetic Concept