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3 years ago

25 POINTS!!!!! add. express your answer as a fraction. Do not include spaces in your answer 5 1/4+ 15.5

Mathematics

2 answers:

ICE Princess25 [194]3 years ago

8 0

Answer:

$20\frac{3}{4}$

Step-by-step explanation:

=> $5\frac{1}{4} + 15\frac{1}{2}$

=> $\frac{21}{4}+ \frac{31}{2}$

=> $\frac{21+62}{4}$

=> $\frac{83}{4}$

=> $20\frac{3}{4}$

ss7ja [257]3 years ago

5 0

Answer:

The answer is 83/4

Step-by-step explanation:

5 1/4+15.5

21/4+15.5

Taking LCM

21/4+15.5*4/1*4

21/4+62/4

83/4

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Answer:

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Step-by-step explanation:

Let speed of boat = u $\frac{km}{hr}$

Speed of current = v $\frac{km}{hr}$

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Time taken in downstream = 32 hours

$32 = \frac{100}{u +v}$

$u + v = \frac{100}{32}$

u + v = 3.125 ------ (1)

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$48 = \frac{100}{u -v}$

$u -v = \frac{100}{48}$

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By solving equation (1) & (2)

u = 2.6045 $\frac{km}{hr}$

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Now the time taken by the un powered raft to cover this distance

$T = \frac{100}{v}$

Because un powered raft travel with the speed of the current.

$T = \frac{100}{0.5205}$

T = 192.12 hr

Therefore the time taken by the un powered raft to cover this distance is

T = 192.12 hr

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Answer:

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