a , b , c hired a car for rs . 520 and used it for 7,8 and 11 hours respectively . hire charges paid by b were :
sol . a : b : c = 7 : 8 : 11 . hire charges paid by b = rs . [ 520 * 8 / 26 ] = rs . 160 answer a
multiply(520, divide(multiply(const_4, const_2), add(add(add(const_4, const_3), multiply(const_4, const_2)), 11)))