Question

(c) What value of x will make the number 20 : 30 :: 40 : x in proportion?
(i) 50
(ii) 60
(iii) 70
(iv)80
d) What is the cost of 7 pencils, if 11 pencils cost is $132?
(i) ₹77
(ii) ₹ 70
(iii) ₹84
(iv)₹91
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Answer 1

Answer:

1st question answer is 60

2nd question answer is 84

Answer 2

Answer:

c) 20:30::40:x

20/30=40/x

:.x=40×30/20= ii ) 60...Ans

d)Cost of 11 pencils = Rs.132

Cost of 1 pencil = 132/11= Rs.12

:. Cost of 7 pencils=12×7= iii)Rs.84...Ans