∆ find the area of a square whose:↓
→ a) side=8cm b) diagonal =5.2 CM
∆find the expenditure of putting a barbed wire around a 4 hectare square field, 45 rupees meter.
{use 1 hectare =10,000 m²
~♥♥♥
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2
Answer:
Q1) a) 64m²
b) 13.52cm²
Q2) ₹ 36,000/-
Step-by-step explanation:
Q1) a) area of □ = s × s
= 8 × 8 cm²
= 64 cm²
b) area of □ = 1/2 × d²
= 1/2 × 5.2² cm²
= 13.52 cm²
Q2) area of □ = 4 hectare² (4×10,000 m²)
s² = 40,000m²
side = root 40,000 m²
side = 200 m
perimeter of □ = 4s
= 4 × 200
= 800 m
total expenditure = ₹ 45 × 800/-
= ₹ 36,000/- (ans)
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