Find the length of lace needed to put around the edge of a dozen round table cloths with diameter 70 cm. Find its cost at the rate of 15 per metre.
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6
Answer:
circumference =πd=1.5πm
length of lace required = circumference of circle
=1.5×3.14=4.71m
length of lace required =4.71m
one meter of lace =Rs.15
4.71m lace =?
=14.71×15=Rs.70.65
Answered by
4
Answer:
- First find out tye circumference of circle = 2×22/7×r(radius)
- circumference = 2×22/7×70 = 440 cm
- now 440/100 = 4.4 m
- now cost of lace = legth of lace × rate per metre
- cost = 4.4×15 = 66 rupees
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