If Tanya burns 7 calories for every meter she walks. How many times should she complete the entire track so that she burns 448 calories? (All dimensions are in m and $π$ = 22/7)

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Solution

The correct option is B
1

The perimeter of track = Perimeter of the 2 semi-circles + the length of the straight paths

= $2 \times π r + 10 + 10$

= $2 \times \frac{22}{7} \times 7 + 10 + 10$

= 64 m

Total calories she burns per round = 7 $\times$ 64 = 448 calories

Number of rounds = $\frac{T o t a l c a l o r i e s n e e d e d t o b u r n}{C a l o r i e s p e r r o u n d} = \frac{448}{448}$ = 1 round

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If Tanya burns 7 calories for every meter she walks. How many times should she complete the entire track so that she burns 448 calories? (All dimensions are in m and π = 22/7)

If Tanya burns 7 calories for every meter she walks. How many times should she complete the entire track so that she burns 448 calories? (All dimensions are in m and $π$ = 22/7)