Question

pences ( =sqrt{(20)^{2}-left(gamma_{B}-v_{A}right)^{2}} )
( =sqrt{120^{2}-60^{2}} )
( =sqrt{180 times 60} )
( =frac{60 sqrt{3}=9 R}{120 sqrt{3}+120 pi} )
[
begin{array}{l}120(pi+sqrt{3}) mathrm{cm}end{array}
]
pewemon ( A A^{prime}=sqrt{left(00^{prime}right)^{2}-left(r_{B}+V_{A}right)^{2}} )
( =sqrt{120^{2}-100^{2}} )
( =sqrt{20 times 220} )
( =20 sqrt{11} )
( =10 sqrt{44} mathrm{cm} )
(3) Ans

# driver pullen no pudley A belt drive system is given in the figure such that distance between centres (00') = 120 cm and radii are 20 cm and 80 cm respectively. Length of the belt PQRS is equal to - (A) 120(+3) cm (C) 60(21+13)cm (B) 120(1 – 3)cm (D) 60(21-13)cm Length of the internal common tangent (AA) is equal to - (A) 44 V10 cm (B) 10/44 cm (C) 22/20 cm (D) 20/22 cm

Solution