general Maths Puzzle

S varies directly as R and T varies inversely as R. At some particular time R=20, S=40 and T=10. Now if S is changed to 20, then what is the value of T ?

Read Solution (Total 2)

ST/R is constant.

so 40*10/20 = 20*T/20
T= 20
12 years agoHelpfull: Yes(3) No(0)

when s is 20 (half),T WILL BE DOUBLED=10*2=20

S IS INVERSELY VARYING AS PER GIVEN PROBLEM
12 years agoHelpfull: Yes(1) No(1)

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If a shopkeeper gives 51% discount and still earns 51% profit. Then how much times the selling price was quoted as compared to cost price ? A man bought some rice at the rate of Rs 15/kg and some other quantity at the rate of Rs 24/kg.He mixed them and sold at the rate of Rs 21.60/kg, gaining a profit of 20%. What was the respective ratio of the two varieties ?