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contact with is grammatically incorrect.The preposition with means accomplained by a person or thing. Here in this sentence contact is an action that has to be done without accomplained by someone.So with is inappropriate.
Perimeter of a rectangle is 50% more than that of a square of side 30 cm. If the difference between the length and breadth of the rectangle is 7 cm, res...
The complete expense of covering the floor of a chamber at the rate of Rs 7.50 per square centimeter amounts to Rs 1875. If the length of the room measu...
A cylindrical pencil of diameter 1.2 cm has one of its end sharpened into a conical shape of height 1.4 cm. The volume of the material removed is
The volume of a sphere is 2304π cm3. Find the surface area of the given sphere.
A rectangular ground is 85 metre long and 65 metre broad. If two 10 metre wide paths one parallel to the breadth and one parallel to the length, of the�...
A chord of the larger among two concentric circles is of length 10 cm and it is tangent to the smaller circle. What is the area (in cm²) of the annula...
Outer diameter of 20 cm long pipe is 25 cm. If the thickness of the metal in the pipe is 1 cm. Find the total surface area of the pipe?
If the 4-digit number x67y is exactly divisible by 9, then the least value of (x + y) is _____.
Two circles touch each other externally at P. AB is a direct common tangent to the two circles, A and B are points of contact, and ∠ PAB = 40° . The...
The length of a width is 21 cm and the side of a square is 25 cm less than the length and width of the rectangle. If perimeter of the rectangle is 30 cm...
