Math, asked by abcd7487, 3 months ago

2 यदि A : B = 8:15, B:C = 5:8 तथा C: D=4:5
हो, तो A : D बराबर होगा
(a) 2:7 (b) 8 : 15 (c) 15:4 (d) 4 : 15
please give me short tricks solutions .​

Answers

Answered by jsanket0038
1

Answer:

c) 15 : 4

Step-by-step explanation:

A = 15 , B = 8 , C = 5 , D = 4

Answered by ExElegant
5

━━━━━━━━━━━━━━━━━━━━━━━━

 \large \underline \bold{Given}:-

\qquad\sf A \: : \: B \: = \: 8 \: : \: 15

\qquad \sf B \: : \: C \: = \: 5 \: : \: 8

\qquad\sf C \: : \: D \: = \: 4 \: : \: 5

 \large \underline \bold{To \: Find}:-

\qquad\sf A \: : \: D \: = \: \: ?

 \large \underline \bold{Solution}:-

\qquad\sf A \: : \: B \: = \: 8 \: : \: 15

So ,

\qquad\sf B \: : \: C \: = \: 5\times 3 \: : \: 8\times 3

\qquad\sf B \: : \: C \: = \: \: \: \: \: 15 \: \: : \: \: 24

So ,

\qquad\sf C \: : \: D \: = \: 4\times 6 \: : \: 5\times 6

\qquad\sf C \: : \: D \: = \: \: \: \: \: 24 \: \: : \: \: 30

Now ,

\qquad\sf A \: \: = \: \: 8

\qquad\sf B \: \: = \: \: 15

\qquad\sf C \: \: = \: \: 24

\qquad\sf D \: \: = \: \: 30

So ,

\qquad\qquad \small \bold{A \: \: : \: \: D}

\qquad\qquad\sf 8 \: \: : \: \: 30

\qquad\qquad \small \bold{4 \: \: : \: \: 15}

━━━━━━━━━━━━━━━━━━━━━━━━

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