1 year ago

Explain how subtracting 4/5 - 3/5 involves subtracting 4 and 3

Mathematics

1 answer:

Vesnalui [34]1 year ago

3 0

Answer:

Explain how subtracting 4/5 - 3/5 involves subtracting 4 and 3

Step-by-step explanation:

Trains A and B, 200 km apart on the same straight track, travel at speeds of 50 km/hr and 65 km/hr respectively. At the end of 1 hour, the distance between the trains could not be

A. 85 km

B. 115 km

C. 185 km

D. 215 km

Apparently, the answer is B.) 115 km, but I need a solution.

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Find the lateral area and the surface area of the right cone. Round your nearest answers to the nearest hundredth

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Step-by-step explanation:

Given that,

The height of the cone, h = 24 cm

The radius of the cone, r = 10 cm

The slant height of the cone is :

$l=\sqrt{h^2+r^2} \\\\l=\sqrt{24^2+10^2} \\\\l=26\ cm$

The lateral area of the cone is given by :

$A=\pi rl\\\\=3.14\times 10\times 26\\\\=816.4\ cm^2\approx 816\ cm^2$

The surface area of the cone is given by :

$A=2\pi rh\\\\=2\times 3.14\times 10\times 24\\\\=1507.2 \approx 1507\ cm^2$

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