A man spends 2/5 of his income on house rent, 3/10 on food and 1/8 on conveyance. If he has Rs. 3500 left with him, find his expenditure on food and conveyance together.
Rs. 8500
(7/40) of x = 3500 ⟹ x = 2000. Food and conveyance = (17/40)×20000 = 8500