Question
A conical water tank has a radius of 7 meters and a
height of 24 meters. Water is being pumped into the tank at the rate of 20 cubic meters per minute. How long will it take to fill the tank completely?Solution
Volume of cone = (1/3)πr²h, where r = 7 m and h = 24 m. Volume = (1/3) × (22/7) × 7² × 24 = 1232 m³. Rate of pumping = 20 cubic meters per minute. Time taken = Volume / Rate = 1232 / 20 = 61.6 minutes. Correct answer: a) 61.6 minutes
((12+12+12+12)÷4)/((8+8+8+8+8+8)÷16) = ?
What will come in the place of question mark (?) in the given expression?
(18 × 8 ÷ 12) × 10 = ?
What value should come in the place of (?) in the following questions?
√? + 10 * 18 + 16 * 4 = 280
What will come in the place of question mark (?) in the given expression?
(? ÷ 16) = (20 ÷ ?) X 20What will come in place of the question mark (?) in the following expression?
40% of 150 – ?% of 80 = 25% of 400
? = 0.05% of 12000 + 175% of 4800 – 133Â
√14400 x √8100 - (60)² = ? + (80)²
√(?) ² = √7396 - √6889
74% of 2840 + 80% of 1640 - ?= 47²
