1.
Kilometer:
A kilometer (US spelling: kilometer; symbol: km) is a unit of length that is equal to 1,000 meters, the current International System of Units (SI) base unit of length. The kilometer is part of the metric system
two towns P and Q are 15.5 cm apart.
the scale of the map is 1cm:4km
Now,
two towns P and Q = 15.5 cm
= 15.5*4
= 62 km
the actual distance between P and Q = 62 km
2.
A pharmacist mixes 5g of a powder with 45cm² of water
45 cm2 = 5 g of powder
1 cm2 = 5/45 g of powder
1 cm2 = 1/9 g of powder
81cm² of water to make a larger amount of the same medicine
Now,
1 cm2 = 1/9 g of powder
81 cm2 = 81/9 g of powder
81 cm2 = 9 g of powder
More details:brainly.com/question/28167886
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