a car started running at a speed of 29 km / hr and the speed of the car was increased by 2 km / hr at the end of every hour . find the total distance covered by the car in the first 10 hours of the journey .
"a 41 km the total distance covered by the car in the first 10 hours = 32 + 34 + 36 + 38 + 40 + 42 + 44 + 46 + 48 + 50 = sum of 10 terms in ap whose first term is 32 and last term is 50 = 10 / 2 [ 32 + 50 ] = 410 km ."
divide(add(add(29, multiply(2, 10)), 29), 2)