10. Eine Maschine soll Schuhbändelpaare von je 80 cm Länge pro Schuhbändel schneiden und verpacken. In die Maschine wird eine 168 m lange Rolle Schuhbändelschnur eingesetzt. Bei der Kontrolle des 30 . Paares merkt der Prüfer, dass die Maschine auf die Bändellänge 85 cm eingestellt war.

68. Колико је: а) \( 12 \cdot(-4) ; \quad \) б) \( (-8) \cdot 11 ; \quad \) ц) \( (-2) \cdot(-37) \)

2074 Q.No. 1 A person drives a car between the two places \( x \) and \( y \). On his outward joumey he consumes 8 km per liter of petrol, on his return journey he covers 12 km per liter. Find the average of his mileage assuming the distance between the two places to be 100 kms .

2077 Q.No. 4 A cyclist travels the first km at the rate of 10 km per hour, the second km at the rate of 3 km per hour and the third km at the rate of 6 km per hour. Find the average speed of the cyclist.

Round \( 3.76 \) to the nearest tenth.

Ex 14 : Sand costs \( \$ 98.90 \) per tonne. This cost includes a tax of \( 15 \% \), Calculate the amount of tax paid per tonne of sand.