the hieght of student increases in ratio 2:3 the present hieght is 140 cm .what is the new hieght
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Answer:
210 would be the new height
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Step-by-step explanation:
Present height h=64 cm
Let growth g=1/8=0.125
Height after 1st year = 64+ (64*1/8)=72 cm
Height after 2nd year = 72+(72*1/8)=81 cm
Generalised formula ,
Height after n years = h(1+g)^n
Height after 2 years = 64(1+1/8)^2 =64(1.125)^2 =64(1.265625) =81 cm
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